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Would you like to inspect the original subtitles? These are the user uploaded subtitles that are being translated: 1 00:00:08,039 --> 00:00:13,880 How often are you given the opportunity to repeat a fantastic experience and 2 00:00:13,880 --> 00:00:17,360 have it be even better the second time around? 3 00:00:17,940 --> 00:00:21,720 This is my return trip to a volcano. 4 00:00:22,460 --> 00:00:25,660 A volcano erupting with sharks. 5 00:00:26,920 --> 00:00:33,100 I'll be diving to my limits, looking for seven species of sharks in seven days, 6 00:00:33,440 --> 00:00:36,140 including a deep water mystery. 7 00:00:37,710 --> 00:00:40,290 Dive with me to Shark Volcano. 8 00:00:56,950 --> 00:00:58,570 This is Cocos Island. 9 00:00:58,810 --> 00:01:04,290 In my view, one of the last truly pristine places in the world. It's 300 10 00:01:04,290 --> 00:01:06,150 offshore of Costa Rica. 11 00:01:09,070 --> 00:01:13,290 And two and a half million years ago, none of this was here. Then a volcano 12 00:01:13,290 --> 00:01:15,610 erupted, and this is the peak of the volcano. 13 00:01:16,170 --> 00:01:22,130 Now, it's a tropical rainforest that gets 24 feet of rain each year. But if 14 00:01:22,130 --> 00:01:24,870 think that's lush, you should see what's underneath. 15 00:01:25,110 --> 00:01:29,490 Now, imagine a volcano sticking out in the middle of the Pacific Ocean. 16 00:01:29,770 --> 00:01:34,290 Cold currents are coming by, bringing nutrient -rich water up to the top. 17 00:01:34,560 --> 00:01:39,400 which is incredibly productive and supports an extraordinary amount of 18 00:01:39,800 --> 00:01:43,620 And that is what we're interested in, showing you what is underwater. 19 00:01:44,500 --> 00:01:49,260 Cocos Island supports a huge variety of life, a lot of different types of 20 00:01:49,260 --> 00:01:51,440 animals as well as a lot of numbers. 21 00:01:51,640 --> 00:01:55,480 And with that kind of variety, I'm not sure exactly what we're going to be 22 00:01:55,480 --> 00:01:59,820 seeing. But this, I can assure you, we will be seeing a lot of dark. 23 00:02:05,800 --> 00:02:10,460 The reason so many sharks come here is because Cocos is like a truck stop in 24 00:02:10,460 --> 00:02:13,320 sea. There's plenty of food and good shelter. 25 00:02:13,580 --> 00:02:19,020 It's an oasis in a watery desert, and the life it attracts is why I'm so 26 00:02:19,020 --> 00:02:20,020 to come back. 27 00:02:23,300 --> 00:02:29,140 I first came to Cocos Island 12 years ago. Even then, I recognized that this 28 00:02:29,140 --> 00:02:30,140 place was special. 29 00:02:30,300 --> 00:02:32,880 But I hadn't realized just how special. 30 00:02:33,450 --> 00:02:37,390 I knew there were a lot of species of sharks in Coco's, but I had only come 31 00:02:37,390 --> 00:02:39,410 across three or four on my first trip. 32 00:02:40,910 --> 00:02:42,450 This is shark heaven. 33 00:02:42,770 --> 00:02:49,190 Among the top sharks you might find here are the frenetic white tips, the bold 34 00:02:49,190 --> 00:02:54,010 and beautiful silver tip, and of course, the mighty hammerhead. 35 00:02:55,410 --> 00:03:00,070 There's also that great mystery about a deepwater shark, which has been seen 36 00:03:00,070 --> 00:03:02,630 living in these waters, but it's never been filmed. 37 00:03:03,260 --> 00:03:06,360 So we're going to give it a try by diving deep. 38 00:03:07,800 --> 00:03:11,360 And to bring that to you, we've got some pretty special equipment. 39 00:03:11,900 --> 00:03:16,400 Starting with this, of course. We have two of these. This is a high -definition 40 00:03:16,400 --> 00:03:18,540 camera. We've got another one here. 41 00:03:19,380 --> 00:03:25,180 To dive, we've got a lot of fun toys. We've got semi -closed and fully -closed 42 00:03:25,180 --> 00:03:30,440 rebreathers. Normal scuba gear consists of a tank of compressed air. Nothing 43 00:03:30,440 --> 00:03:34,800 fancy. You just breathe it away in about an hour or so. Then you have to return 44 00:03:34,800 --> 00:03:35,800 to the surface. 45 00:03:36,460 --> 00:03:41,740 But with a rebreather, you reuse the air you breathe. It's cleaned by a special 46 00:03:41,740 --> 00:03:46,200 element called a scrubber, which removes carbon dioxide and it automatically 47 00:03:46,200 --> 00:03:47,560 adds oxygen as needed. 48 00:03:47,800 --> 00:03:52,120 With a rebreather, you can stay down much longer and it's quiet. 49 00:03:52,640 --> 00:03:54,700 Great for getting close to sharks. 50 00:03:55,900 --> 00:04:00,920 see Mark dealing with his scrubber over there right now. But basically, these 51 00:04:00,920 --> 00:04:07,600 rebreathers allow us extended bottom time as well as the ability to safely go 52 00:04:07,600 --> 00:04:10,600 very deep. We're going to be talking more about them later. 53 00:04:10,900 --> 00:04:12,580 But we also have this. 54 00:04:13,320 --> 00:04:15,680 This is a helmet. 55 00:04:17,040 --> 00:04:22,990 This helmet allows me to sit in a room not a very... large room, mind you. It's 56 00:04:22,990 --> 00:04:27,210 only slightly larger than my head. Nevertheless, I'm very comfortable in 57 00:04:27,210 --> 00:04:33,210 breathing air. It all comes down through this big umbilical cord. So we have two 58 00:04:33,210 --> 00:04:38,550 -way communication plus cameraman can hear me. So this bit of technology 59 00:04:38,550 --> 00:04:41,190 us to do what we're going to do now. 60 00:04:43,030 --> 00:04:45,570 And that is to find some sharks. 61 00:04:46,170 --> 00:04:49,530 They say that big surprises come in small packages. 62 00:04:50,170 --> 00:04:54,690 And that certainly is the case with our first shark, the reef white tip. 63 00:04:57,370 --> 00:05:02,470 Reef white tip sharks seem to have a split personality, which you will soon 64 00:05:02,470 --> 00:05:03,570 clearly witness. 65 00:05:04,550 --> 00:05:07,630 But we'll start with the easy part, midday. 66 00:05:10,270 --> 00:05:15,170 Let's have a look. You may be wondering why I'm appearing so irresponsible in 67 00:05:15,170 --> 00:05:16,430 walking all over the coral. 68 00:05:16,810 --> 00:05:19,290 It's because all the coral here is dead. 69 00:05:20,030 --> 00:05:21,590 I'll tell you more about that later. 70 00:05:23,750 --> 00:05:26,430 It obviously doesn't affect the fish population. 71 00:05:26,850 --> 00:05:29,930 There are huge schools of fish swimming everywhere. 72 00:05:30,670 --> 00:05:34,690 But the reef white -tip sharks are found right on the sandy seafloor. 73 00:05:40,430 --> 00:05:44,090 I wanted to get a nice, cozy shot with these sharks. 74 00:05:44,350 --> 00:05:47,390 It soon became clear that would prove difficult. 75 00:06:16,040 --> 00:06:20,280 No wonder they wouldn't lay still with a stumbling beast crashing nearby. 76 00:06:28,460 --> 00:06:32,200 Eventually, we found one that looked like it may put up with us. 77 00:06:34,880 --> 00:06:36,880 Who said this job was easy? 78 00:06:40,820 --> 00:06:43,140 Hocus Island supports an enormous... 79 00:06:43,470 --> 00:06:45,350 a population of reef white -tip sharks. 80 00:06:45,750 --> 00:06:49,910 And you can see their daytime behavior is rather lazy. 81 00:06:50,350 --> 00:06:53,410 They're not slowly swimming like these above. 82 00:06:54,490 --> 00:06:59,590 They're laying on the bottom, taking a rest, generally in little sandy patches 83 00:06:59,590 --> 00:07:01,130 in reef areas like this. 84 00:07:01,410 --> 00:07:05,650 And this is the reason we wanted to get close, because now you can see those 85 00:07:05,650 --> 00:07:08,090 little cleaning fish popping in and out of the gills. 86 00:07:08,370 --> 00:07:10,670 This is a full -service truck stop. 87 00:07:11,610 --> 00:07:12,830 Reef white -tips. 88 00:07:13,370 --> 00:07:15,450 exhibit this kind of behavior in the daytime. 89 00:07:15,830 --> 00:07:21,690 They don't do much. They just kind of slowly move around, swim in small 90 00:07:21,830 --> 00:07:27,670 and lay in the sand. Now, most sharks have to continue swimming in order to 91 00:07:27,670 --> 00:07:32,450 breathe. They sink, and they can't get any water over their gills. Therefore, 92 00:07:32,710 --> 00:07:33,890 they suffocate and die. 93 00:07:35,430 --> 00:07:36,430 Reef white tips. 94 00:07:36,910 --> 00:07:38,290 See us now, puppy. 95 00:07:39,080 --> 00:07:41,740 That's a trick that they can do that most sharks cannot. 96 00:07:42,000 --> 00:07:47,280 They physically pump water over the gills so they can get oxygen to change 97 00:07:47,280 --> 00:07:48,239 at rest. 98 00:07:48,240 --> 00:07:51,900 Now, speaking of rest, that's what's going on here. 99 00:07:52,580 --> 00:07:55,000 Three -point tip sharks are like Dr. 100 00:07:55,280 --> 00:07:56,279 Jekyll and Mr. 101 00:07:56,280 --> 00:08:02,500 Hyde. In the daytime, they're laying around, swimming in slow circles, not 102 00:08:02,500 --> 00:08:03,500 much at all. 103 00:08:03,600 --> 00:08:07,340 But believe me, this guy lives on the night shift. 104 00:08:09,040 --> 00:08:13,080 We'll see this animal performing a very, very different behavior. 105 00:08:30,620 --> 00:08:35,919 It might seem a little bit unusual for me to be walking around the bottom like 106 00:08:35,919 --> 00:08:36,919 this. 107 00:08:38,120 --> 00:08:41,919 Normally, I wouldn't do that on a coral reef, which is exactly what all of this 108 00:08:41,919 --> 00:08:45,500 used to be, until El Niño came to town. 109 00:08:45,720 --> 00:08:52,680 Warm water has moved into Cocos Island and basically killed all of this coral. 110 00:08:52,960 --> 00:08:59,200 Unfortunately, this once thriving coral reef has now rendered algae -covered 111 00:08:59,200 --> 00:09:00,200 rubble. 112 00:09:02,880 --> 00:09:05,720 Another problem they have is this. 113 00:09:07,050 --> 00:09:09,850 This is crown -of -thorn starfish. 114 00:09:11,370 --> 00:09:15,690 Occasionally, these crown -of -thorn starfish will have a population 115 00:09:16,250 --> 00:09:19,810 When that happens, these things are everywhere. 116 00:09:20,150 --> 00:09:21,610 And guess what they eat? 117 00:09:21,930 --> 00:09:22,930 You got it. 118 00:09:23,050 --> 00:09:27,610 Coral. So what this one is doing, it's creeping onto this little bitty coral 119 00:09:27,610 --> 00:09:29,530 head right here, which is called parietae. 120 00:09:29,810 --> 00:09:35,490 It exudes its gut. It takes its gut out of its body, covers the coral, digests 121 00:09:35,490 --> 00:09:41,960 it. then brings the gut back in and crawls away all after a day or so, 122 00:09:41,960 --> 00:09:46,480 nothing behind but a bleached -out, white, dead skeleton. 123 00:09:47,280 --> 00:09:52,100 Many years ago, these crown of thorns were thought to be the bane of the 124 00:09:52,180 --> 00:09:55,940 Everyone hated them, and divers were going in and cutting them up in pieces. 125 00:09:57,320 --> 00:09:58,960 Bad idea! Guess what? 126 00:09:59,280 --> 00:10:01,860 You cut this in half, and it makes two. 127 00:10:05,840 --> 00:10:06,880 and that's what we're going to do. 128 00:10:13,560 --> 00:10:14,900 Take a look at this. 129 00:10:15,320 --> 00:10:21,300 Right out beyond me, it looks like the sand flats need a bit of a haircut. 130 00:10:21,780 --> 00:10:28,640 Well, all of these little apparent bits of foliage are actually 131 00:10:28,640 --> 00:10:32,640 fish. More specifically, eels, garden eels. 132 00:10:35,880 --> 00:10:39,400 If you look out there, it looks like a garden of eels. 133 00:10:40,840 --> 00:10:43,940 They live in a burrow, which they dig with their tail. 134 00:10:44,520 --> 00:10:46,600 When danger comes, watch. 135 00:10:53,940 --> 00:10:54,940 Boom! 136 00:10:55,700 --> 00:10:56,700 Away they go. 137 00:10:57,860 --> 00:11:01,320 Down in the hole, safe as they can be. 138 00:11:02,400 --> 00:11:03,940 Beautiful creatures, aren't they? 139 00:11:06,440 --> 00:11:11,340 And right on cue, a black -tipped shark perfectly illustrates our point. See 140 00:11:11,340 --> 00:11:12,680 them disappear near the shark? 141 00:11:13,580 --> 00:11:17,260 And once danger has passed, they come right back up again. 142 00:11:20,580 --> 00:11:23,280 Our only danger was running out of air. 143 00:11:27,700 --> 00:11:32,460 It was a relief to see so many reef white -tipped sharks around Cocos, 144 00:11:32,460 --> 00:11:35,140 it wasn't like that on my last trip 12 years ago. 145 00:11:35,530 --> 00:11:39,870 Back then, there was ruthless fishing near the island, which killed many of 146 00:11:39,870 --> 00:11:41,170 these magnificent fish. 147 00:11:41,690 --> 00:11:46,710 Sometimes, just their fins were cut off to make shark fin soup, and their living 148 00:11:46,710 --> 00:11:48,490 bodies dumped overboard. 149 00:11:49,910 --> 00:11:55,350 Thankfully, Cocos is now a well -protected marine nature reserve with a 150 00:11:55,350 --> 00:11:58,170 exclusion zone, and it appears to be working. 151 00:11:58,810 --> 00:12:01,930 The only boats near Cocos today are dive boats. 152 00:12:02,330 --> 00:12:06,010 and the money we pay for the dive permits goes toward the conservation 153 00:12:11,710 --> 00:12:16,790 In order to film the Jekyll and Hyde nature of White Tips, we'd have to go 154 00:12:16,790 --> 00:12:18,150 in the water for a night dive. 155 00:12:18,650 --> 00:12:23,390 Along a shallow reef on one side of the island, there was one place where we'd 156 00:12:23,390 --> 00:12:25,310 been told they'd come in their hundreds. 157 00:12:28,620 --> 00:12:33,880 White -tipped sharks are not scary in themselves, but at night, they 158 00:12:33,880 --> 00:12:37,260 hunt in packs and become quite a different kettle of fish. 159 00:12:45,720 --> 00:12:49,220 Diving at night is very different to daytime diving. 160 00:12:49,900 --> 00:12:53,680 Coordinating a film crew is nearly impossible in the dark, and you have to 161 00:12:53,680 --> 00:12:56,460 carefully plan the dive before you get in the water. 162 00:13:20,940 --> 00:13:24,880 On the way down, it appeared as though the bottom was moving. 163 00:13:25,620 --> 00:13:27,200 But that was no bottom. 164 00:13:31,840 --> 00:13:35,320 It was a sea of sharks, just as we had hoped. 165 00:13:35,580 --> 00:13:39,040 I'd never seen so many reef white tips in one place before. 166 00:13:39,240 --> 00:13:40,240 What a treat! 167 00:13:44,080 --> 00:13:49,160 This gave us a fantastic opportunity to see the sharks behaving naturally. They 168 00:13:49,160 --> 00:13:54,200 seemed to completely ignore us. Their minds were on more important things, 169 00:13:54,200 --> 00:13:55,200 dinner. 170 00:13:55,400 --> 00:14:01,180 Now this is a different scene from what we saw with reef white tips. 171 00:14:01,560 --> 00:14:06,580 Remember in the daytime how they were so classically placid, lying on the bottom 172 00:14:06,580 --> 00:14:07,299 of the sand? 173 00:14:07,300 --> 00:14:08,960 Well, this is the same animal. 174 00:14:09,640 --> 00:14:11,360 This is classic. 175 00:14:12,060 --> 00:14:14,060 reef white dip behavior at night. 176 00:14:16,100 --> 00:14:20,220 Look at this. These things completely transform. It's almost like a different 177 00:14:20,220 --> 00:14:24,500 animal all together. Now we understand why they're long and thin. 178 00:14:24,800 --> 00:14:28,860 Because look at the way they feed. They rush in and out of these little nooks 179 00:14:28,860 --> 00:14:31,820 and crannies of the reef, chasing fish in holes. 180 00:14:32,060 --> 00:14:34,620 And they follow them in the holes and they can pull them out. 181 00:14:38,220 --> 00:14:40,300 They're in feeding mode right now. 182 00:14:40,920 --> 00:14:44,920 They're looking for food. Reef white -tip sharks generally aren't considered 183 00:14:44,920 --> 00:14:46,720 dangerous or a threat to man. 184 00:14:46,960 --> 00:14:48,800 As a matter of fact, most sharks aren't. 185 00:14:49,580 --> 00:14:54,380 So they're pretty much going on about their business. As long as I don't do 186 00:14:54,380 --> 00:14:59,520 anything stupid like grab one or spear a fish, I'll be perfectly fine. 187 00:15:01,400 --> 00:15:06,620 Diving with reef white -tips is like playing on a rugby team. You become part 188 00:15:06,620 --> 00:15:08,860 the pack, and it gets pretty rowdy. 189 00:15:09,400 --> 00:15:13,960 Of course, normally it would be pitch dark down here, but we need light. 190 00:15:14,320 --> 00:15:19,080 But the white tips don't. They can hunt by sensing the tiny electrical currents 191 00:15:19,080 --> 00:15:20,880 produced in the muscles of fish. 192 00:15:21,160 --> 00:15:26,120 If you're a fish, it's best to stay put when this wolf pack comes by. 193 00:15:26,520 --> 00:15:27,520 They're excited. 194 00:15:27,740 --> 00:15:33,340 They've had a couple of fish. They're going after more. So my guess is the 195 00:15:33,340 --> 00:15:36,180 hunting time for these sharks is a little later at night. 196 00:15:36,980 --> 00:15:41,580 And sure enough, We didn't have to wait long before the games began. 197 00:15:44,000 --> 00:15:45,180 He's on his tail! 198 00:15:45,380 --> 00:15:46,380 He's on his tail! 199 00:15:46,520 --> 00:15:47,660 He's on his tail! Oh! 200 00:15:50,400 --> 00:15:51,700 I think he's gone. 201 00:15:54,040 --> 00:15:56,860 Oh, when less fish in the world. 202 00:15:57,560 --> 00:15:59,660 They're definitely in hunting mode now. 203 00:16:00,200 --> 00:16:03,740 We've seen about four Minpachi get taken already. 204 00:16:04,200 --> 00:16:06,260 You almost think, oh, those fools! 205 00:16:06,830 --> 00:16:09,870 Why are they coming out of the reef? If they only stayed buried, they would be 206 00:16:09,870 --> 00:16:10,870 fine. 207 00:16:10,890 --> 00:16:13,670 But how would you feel with 50 sharks chasing you? 208 00:16:55,920 --> 00:17:01,560 myself in the reef here and it seems like I'm in an area where a couple of 209 00:17:01,560 --> 00:17:07,380 might be hiding so I'll probably not stay here very long 210 00:17:38,350 --> 00:17:39,069 What a start. 211 00:17:39,070 --> 00:17:44,530 With the amazing reef white tips behind us, we can now focus on shark number 212 00:17:44,530 --> 00:17:45,530 two. 213 00:17:46,630 --> 00:17:49,010 Our next mission was to Wafer Bay. 214 00:17:49,270 --> 00:17:54,530 Here, we hope to join the ranks of hammerheads, perhaps the strangest 215 00:17:54,530 --> 00:17:55,690 shark we'll see here. 216 00:17:56,610 --> 00:18:00,570 Hammerheads can grow to over four meters and weigh half a ton. 217 00:18:00,970 --> 00:18:06,190 For a fearsome predator, they're hard to get close to. Seems the slightest noise 218 00:18:06,190 --> 00:18:07,410 sends them away. 219 00:18:07,930 --> 00:18:12,670 But I really wanted to see them up close and test one theory about why they come 220 00:18:12,670 --> 00:18:13,670 here. 221 00:18:19,730 --> 00:18:22,010 But it was an inauspicious start. 222 00:18:22,610 --> 00:18:27,230 We were raring to go, but were caught in lousy weather, one of the mid -ocean 223 00:18:27,230 --> 00:18:29,350 squalls common this far out to sea. 224 00:18:29,870 --> 00:18:34,330 With all this equipment, it's pretty important to have a stable platform to 225 00:18:34,330 --> 00:18:37,210 from, and big swells can be big trouble. 226 00:18:47,220 --> 00:18:51,900 It's difficult to get decent weather forecasts out here, but the wind settled 227 00:18:51,900 --> 00:18:55,840 down a bit and our enthusiasm to see the sharks got the better of us. 228 00:18:56,820 --> 00:19:01,660 Diving deeper would help us get away from the swell, and in any case, below 229 00:19:01,660 --> 00:19:04,520 meters, we were more likely to find the hammerheads. 230 00:19:05,180 --> 00:19:10,020 But there were no sharks to be seen, and we were buffeted by strong currents. 231 00:19:20,740 --> 00:19:27,080 The only thing we could do was elaborate 232 00:19:27,080 --> 00:19:29,120 on what was wrecking our dive. 233 00:19:45,230 --> 00:19:47,050 struggling against it right now. 234 00:19:47,330 --> 00:19:49,930 But without the currents, there wouldn't be much life here. 235 00:19:50,190 --> 00:19:55,810 It's the currents that are the key to this amazing variety and numbers of 236 00:19:55,810 --> 00:19:56,970 animals that Coco supports. 237 00:20:00,490 --> 00:20:05,750 Coordinating light, camera, and presenter is difficult at the best of 238 00:20:06,010 --> 00:20:10,610 But under these squally conditions, it was proving to be nearly impossible. 239 00:20:11,370 --> 00:20:13,870 It's a struggle down here, guys. I'm doing my best. 240 00:20:18,250 --> 00:20:23,030 The two cable bashers, who were keeping my umbilical from snagging on the sharp 241 00:20:23,030 --> 00:20:28,290 rocks, were actually keeping me alive. On this rig, my air comes down that 242 00:20:28,290 --> 00:20:29,410 umbilical to the helmet. 243 00:20:30,110 --> 00:20:31,110 Okay, guys. 244 00:20:34,830 --> 00:20:39,650 We were thinking of calling it off, but just then we glimpsed sharks in the 245 00:20:39,650 --> 00:20:42,770 distance, and it spurred us on to hang on a bit longer. 246 00:20:48,780 --> 00:20:53,200 But once we got the cameras and lights in position and straightened out the 247 00:20:53,200 --> 00:20:56,260 umbilical, well, you can imagine. 248 00:20:57,620 --> 00:20:58,640 This is classic. 249 00:20:59,180 --> 00:21:00,560 Talk about frustration. 250 00:21:00,880 --> 00:21:06,700 I can see these hammerheads way out in the distance. They're lurking. And as a 251 00:21:06,700 --> 00:21:11,380 matter of fact, I would bet that they would like to be right here where we 252 00:21:11,520 --> 00:21:13,960 But they're not, because we are. 253 00:21:14,320 --> 00:21:17,500 Here we've got about four support people. 254 00:21:18,080 --> 00:21:24,080 We've got two cameras, lights, cables, these big umbilical cords. I'm blasting 255 00:21:24,080 --> 00:21:25,080 all of this air. 256 00:21:25,320 --> 00:21:30,900 We're making a lot of noise down here. And unfortunately, that's keeping away 257 00:21:30,900 --> 00:21:33,780 the very thing we came here to film. 258 00:21:34,080 --> 00:21:35,280 Highly unfortunate. 259 00:21:36,300 --> 00:21:37,420 Incredibly frustrating. 260 00:21:37,800 --> 00:21:43,320 But maybe, if we're patient, we'll still get lucky because they are here. 261 00:21:43,560 --> 00:21:46,280 They're just hiding out. 262 00:21:51,590 --> 00:21:52,590 Yeah, 263 00:21:56,030 --> 00:21:57,030 there's nothing around. 264 00:21:58,090 --> 00:22:02,810 We waited and waited, but they never came close. 265 00:22:03,470 --> 00:22:07,250 For such big beasts, they sure seem shy. 266 00:22:08,690 --> 00:22:14,610 Like most sharks, hammerheads are usually completely placid, and it's rare 267 00:22:14,610 --> 00:22:15,610 them to attack. 268 00:22:15,980 --> 00:22:20,800 Little did we know that our real danger would come from something else entirely. 269 00:22:29,520 --> 00:22:32,860 Yeah. Oh, shit, the anchor line just broke. 270 00:22:33,660 --> 00:22:35,560 Okay, I'm coming up with the anchor. 271 00:22:35,980 --> 00:22:38,880 Coming up, guys. Go ahead and drift. Everything's cool. 272 00:22:39,460 --> 00:22:42,180 But we have no anchor. We're coming up, okay? 273 00:22:43,560 --> 00:22:44,980 Get that anchor line. 274 00:22:45,870 --> 00:22:49,550 With all the gear we had in the water, this could truly be disastrous. 275 00:22:50,130 --> 00:22:55,010 The anchor secures the whole operation, and without it, the boat will drag all 276 00:22:55,010 --> 00:22:58,350 of us uncontrollably up and out to sea. 277 00:22:58,690 --> 00:23:01,830 Are you cool? Are you guys going to be hitting rocks or anything? 278 00:23:05,150 --> 00:23:06,510 Okay, we're coming up. 279 00:23:06,950 --> 00:23:08,270 Everything's fine down here. 280 00:23:10,490 --> 00:23:12,050 This changes everything. 281 00:23:12,810 --> 00:23:18,090 safe diving mandate that you not only watch your depth, but come up slowly and 282 00:23:18,090 --> 00:23:21,850 under control, neither of which we could easily do now. 283 00:23:26,390 --> 00:23:27,390 Okay. 284 00:23:28,510 --> 00:23:30,130 Here's a classic situation. 285 00:23:30,650 --> 00:23:36,430 You notice, this is our anchor line, and it just parted down there. So our whole 286 00:23:36,430 --> 00:23:42,370 operation, two boats, sound men, safety guys, people... 287 00:23:43,470 --> 00:23:46,290 Everything just broke loose from the pinnacle. 288 00:23:46,550 --> 00:23:49,910 And we're all drifting now, so we've got to be very, very careful. 289 00:23:50,330 --> 00:23:54,490 We have no attachments to the land anymore. We're just drifting up there. 290 00:23:54,910 --> 00:23:57,470 So we're all watching our gauges very carefully. 291 00:23:58,070 --> 00:24:01,130 We're making a nice, slow ascent back to the... 292 00:24:19,820 --> 00:24:23,440 I felt very relieved to be working with such professionals. 293 00:24:23,840 --> 00:24:27,700 No one panicked, and we all arrived safely back to the surface. 294 00:24:28,920 --> 00:24:32,520 So looking for the deeper sharks was no longer an option. 295 00:24:32,740 --> 00:24:34,000 But I had an idea. 296 00:24:34,200 --> 00:24:39,820 With all of this rain, the runoff might provide ideal conditions to encounter 297 00:24:39,820 --> 00:24:40,940 the blacktip shark. 298 00:24:41,140 --> 00:24:45,600 We needed an encounter today, and blacktips would provide a good one. 299 00:24:46,890 --> 00:24:49,790 The black -tipped shark grows to over two meters. 300 00:24:50,170 --> 00:24:54,630 It's powerful and will actually leap from the water, launching itself like a 301 00:24:54,630 --> 00:24:56,710 missile through a school of fish like these. 302 00:25:06,110 --> 00:25:11,350 We had to consider the tides, though. We rushed around the island, hoping to get 303 00:25:11,350 --> 00:25:15,230 into the water before the tide was too low and the sharks disappeared. 304 00:25:23,210 --> 00:25:26,730 Luckily, it didn't take us long to find the blackfin. 305 00:25:34,530 --> 00:25:39,750 Sometimes they'll turn the shallows into a froth in their frenzied attack on 306 00:25:39,750 --> 00:25:40,750 baitfish. 307 00:25:41,390 --> 00:25:47,130 But visibility was poor, and the sharks were mighty active, so we decided to be 308 00:25:47,130 --> 00:25:49,350 prudent and cut this dive short. 309 00:25:50,640 --> 00:25:54,460 And just around the corner, the water is much clearer, so we headed there. 310 00:25:54,760 --> 00:25:59,200 In Cocos, it pays to keep looking. You never know what you may find. 311 00:25:59,800 --> 00:26:04,620 You know, one of the things you just can't help but notice is the 312 00:26:04,620 --> 00:26:06,460 numbers of animals. 313 00:26:07,500 --> 00:26:14,440 Not necessarily the number of different kinds, but in terms of sheer numbers, 314 00:26:14,660 --> 00:26:15,800 it's hard to beat this place. 315 00:26:16,000 --> 00:26:17,000 I mean, look at this. 316 00:26:17,520 --> 00:26:22,760 else can you just go strolling along the bottom of the ocean and see thousands 317 00:26:22,760 --> 00:26:29,700 of goat fish above them striped snappers out here in the blue water 318 00:26:29,700 --> 00:26:36,520 well you can see behind me now school of jacks going by sometimes these 319 00:26:36,520 --> 00:26:43,090 jacks number in the thousands and it's all because Cocos Island It's the tip of 320 00:26:43,090 --> 00:26:47,650 a volcano that's come thrusting out of the sea about two million years ago. 321 00:26:48,770 --> 00:26:53,430 Good, clean Pacific water moves along and it hits that island. 322 00:26:53,830 --> 00:26:59,130 What it does, it pushes that cold, nutrient -rich water right up to the 323 00:26:59,490 --> 00:27:05,450 A lot of nutrients, a lot of sunlight, a lot of plants. So phytoplankton blooms. 324 00:27:05,470 --> 00:27:08,610 On the phytoplankton feeds zooplankton. 325 00:27:09,050 --> 00:27:14,230 So plankton feeds little fish, which feed bigger fish, and more and more and 326 00:27:14,230 --> 00:27:18,110 more of them, and pretty soon you're left with an unbelievable place. 327 00:27:21,170 --> 00:27:25,910 And what I love about diving here is that you're constantly surprised. 328 00:27:27,010 --> 00:27:28,010 Constantly. 329 00:27:31,170 --> 00:27:36,130 We were just swimming back to the boat when I noticed a huge female marble ray 330 00:27:36,130 --> 00:27:37,290 acting strangely. 331 00:27:37,980 --> 00:27:42,520 I wasn't sure what was going on, so I decided to follow her. And then we 332 00:27:42,520 --> 00:27:44,000 discovered what was happening. 333 00:27:58,420 --> 00:28:03,100 Dozens of male marble rays, which are really just flattened sharks, were 334 00:28:03,100 --> 00:28:05,700 congregating around a few of these large females. 335 00:28:08,560 --> 00:28:13,180 Eventually, a female slows down and a male, well, they'll do what males do. 336 00:28:13,640 --> 00:28:17,040 Every year, this breeding pack gets together around the island. 337 00:28:17,240 --> 00:28:21,620 But to be in the water at exactly the same time as it was happening was 338 00:28:21,620 --> 00:28:22,620 remarkable. 339 00:28:29,860 --> 00:28:32,780 By now, we were exhausted and needed to surface. 340 00:28:33,180 --> 00:28:37,520 But we seemed to have wandered into the adults -only section of Cocos. 341 00:28:38,170 --> 00:28:43,390 I spotted another intimate aquatic ritual and felt we just couldn't pass it 342 00:28:52,390 --> 00:28:57,230 What we're doing here is waiting for a very special activity. 343 00:28:58,030 --> 00:29:02,630 These little fish behind me, the white ones, vertical black bars, are called 344 00:29:02,630 --> 00:29:03,690 contact tags. 345 00:29:03,930 --> 00:29:08,200 This time of day, as the sun is setting, fish... responding. 346 00:29:08,920 --> 00:29:11,820 The convict tags gather together. 347 00:29:12,080 --> 00:29:16,980 The females will rise up the bottom and go up and release eggs in the water 348 00:29:16,980 --> 00:29:22,600 column. Then the males come rushing up behind them and squirt sperm in the 349 00:29:22,600 --> 00:29:26,980 right next to the eggs. They drift off together. The eggs are fertilized. 350 00:29:27,440 --> 00:29:33,740 They multiply, larvae, baby fish, boom, populate new reefs. 351 00:29:35,980 --> 00:29:37,700 This is the group we want to watch. 352 00:29:37,940 --> 00:29:40,020 Right there. There she goes. 353 00:29:40,540 --> 00:29:46,140 Her stripes, or rather her bars, are thinner, and her body is not quite as 354 00:29:46,140 --> 00:29:46,999 and shiny. 355 00:29:47,000 --> 00:29:48,060 That's the female. 356 00:29:49,560 --> 00:29:55,620 She's actually not even squishing the eggs out. And by zooming up into the 357 00:29:55,620 --> 00:29:59,920 column, the release of pressure squishes the eggs out for her. 358 00:30:02,900 --> 00:30:04,620 There. Oh, nope. 359 00:30:04,920 --> 00:30:05,920 Nope. 360 00:30:05,960 --> 00:30:08,220 It's going to happen, though. I know it's going to happen. 361 00:30:08,780 --> 00:30:11,360 This is exactly the behavior we're looking for. 362 00:30:21,380 --> 00:30:23,520 There we go. There we go. 363 00:30:24,120 --> 00:30:26,060 You saw that big puff of smoke. 364 00:30:26,280 --> 00:30:30,620 That's what we've been waiting for. You saw the female takeoff go right up about 365 00:30:30,620 --> 00:30:31,920 20 feet off the bottom. 366 00:30:32,560 --> 00:30:37,160 make a sharp bend and come right back down, pursued by about 15 males. 367 00:30:37,380 --> 00:30:40,020 Up they went right after her, released their sperm. 368 00:30:40,240 --> 00:30:42,580 Let's keep an eye on her because it will happen again. 369 00:30:46,660 --> 00:30:50,520 Oh my gosh, that's funny. That's what we've been waiting for. 370 00:30:51,560 --> 00:30:52,980 Beautiful creatures, aren't they? 371 00:31:02,320 --> 00:31:07,340 For our next dive, we plan to go out into the deep water to find one of the 372 00:31:07,340 --> 00:31:09,040 -time greats in the shark world. 373 00:31:09,360 --> 00:31:14,660 Our fourth shark, the silver tip, is a magnificent shark, which you would 374 00:31:14,660 --> 00:31:16,460 to find roaming a little way offshore. 375 00:31:17,040 --> 00:31:22,140 It's powerful, can be three meters long, and it would be a real thrill to see 376 00:31:22,140 --> 00:31:23,140 one of these up here. 377 00:31:25,160 --> 00:31:29,840 We were heading out when we were given a golden tip by Nelson, the captain of 378 00:31:29,840 --> 00:31:30,829 the ship. 379 00:31:30,830 --> 00:31:34,730 He told us that silver tips come in close to shore at a special part of the 380 00:31:34,730 --> 00:31:37,210 reef, which juts out toward deep water. 381 00:31:38,210 --> 00:31:42,410 I would be delighted if this were true, because it would make it so much easier 382 00:31:42,410 --> 00:31:43,810 to get close to the silver tips. 383 00:31:44,230 --> 00:31:49,050 But I've never seen silver tips in the shallows, so I remained a little 384 00:31:49,050 --> 00:31:50,050 skeptical. 385 00:31:51,250 --> 00:31:56,830 If these large sharks were coming in so close to Cocos, there must be a really 386 00:31:56,830 --> 00:31:57,830 good reason. 387 00:31:58,030 --> 00:31:59,030 But what? 388 00:32:00,490 --> 00:32:02,550 We're lucky. That's what we're going to see right now. 389 00:32:08,710 --> 00:32:13,690 I thought this would be a wasted dive. 390 00:32:14,210 --> 00:32:17,090 Surely, Nelson was confusing his sharks. 391 00:32:17,530 --> 00:32:22,390 But as I was about to give up, there in front of me was a silver tip. 392 00:32:23,310 --> 00:32:24,310 Unbelievable! 393 00:32:31,310 --> 00:32:36,150 I followed it and ran into several more. Now I was really curious what they were 394 00:32:36,150 --> 00:32:37,150 doing up here. 395 00:32:38,570 --> 00:32:39,570 Here we are. 396 00:32:39,890 --> 00:32:43,790 This is what we came for. Right now something amazing is taking place. 397 00:32:44,110 --> 00:32:45,110 Right over there. 398 00:32:46,030 --> 00:32:51,210 Sharks, I'm used to seeing in deep water, are up here at 40 feet for an 399 00:32:51,210 --> 00:32:52,210 interesting reason. 400 00:32:52,330 --> 00:32:53,330 Let's have a look. 401 00:32:56,570 --> 00:32:57,810 Wow, look at this. 402 00:32:59,560 --> 00:33:00,880 Good shark right there. 403 00:33:01,700 --> 00:33:07,220 It's not the sort of shark that you normally see on the shallow reef in 404 00:33:07,800 --> 00:33:09,800 Usually, they're reef sharks. 405 00:33:10,000 --> 00:33:14,620 They call them that because they live on the reef. This one is a silver tip. 406 00:33:16,980 --> 00:33:22,740 Silver tips are serious sharks. They're big. They eat other sharks as well as 407 00:33:22,740 --> 00:33:23,539 big fish. 408 00:33:23,540 --> 00:33:28,200 They go for the big stuff out in the deep water, the open water. I'm just not 409 00:33:28,200 --> 00:33:29,200 used to seeing. 410 00:33:29,480 --> 00:33:33,740 This shark here, I used to live in the Pacific. I lived in the Marshall 411 00:33:33,960 --> 00:33:38,700 And we would always see these sharks deep on the drop -off, never in shallow 412 00:33:38,700 --> 00:33:39,700 water like this. 413 00:33:43,800 --> 00:33:50,400 Now, what on earth Silvertip is doing in these shallow waters is 414 00:33:50,400 --> 00:33:51,399 beyond me. 415 00:33:51,400 --> 00:33:55,200 Hopefully, if we stay long enough, we'll learn something about it. 416 00:34:04,010 --> 00:34:06,310 What it's doing up here seems surprising. 417 00:34:06,550 --> 00:34:10,350 However, if you look carefully, you'll understand. Look at the tail. 418 00:34:10,610 --> 00:34:13,510 See those little fish? Those are rainbow wrasse. 419 00:34:13,989 --> 00:34:18,590 Rainbow wrasse live on this rock right here. Now, this shark comes out from 420 00:34:18,590 --> 00:34:24,250 deep water all the way over the flats. It's only 40 feet here to get cleaned. 421 00:34:24,550 --> 00:34:29,330 These little wrasse come off the rock, leap up onto the shark, nip the little 422 00:34:29,330 --> 00:34:30,350 parasites off. 423 00:34:30,600 --> 00:34:36,820 tail off of the mouth the shark will actually slow down almost stop the rafts 424 00:34:36,820 --> 00:34:42,600 into the mouth take all the little parasites off it's like ticks on the dog 425 00:34:42,600 --> 00:34:43,199 don't like that 426 00:34:43,199 --> 00:34:57,280 that 427 00:34:57,280 --> 00:35:01,120 is one of the prettiest sharks i've ever seen in my life. 428 00:35:06,360 --> 00:35:07,480 Look at that. 429 00:35:08,600 --> 00:35:10,740 God, what a beautiful creature. 430 00:35:12,220 --> 00:35:13,300 Sitting there. 431 00:35:15,180 --> 00:35:16,960 She's almost gone. 432 00:35:30,180 --> 00:35:35,460 I don't believe this. If you'd never see silver tips coming right over your head 433 00:35:35,460 --> 00:35:37,740 like this, I have never, ever had this experience. 434 00:36:15,660 --> 00:36:19,680 We didn't quite know how to find the next shark because they roam the open 435 00:36:19,680 --> 00:36:22,240 between refueling stations like Cocos. 436 00:36:22,760 --> 00:36:26,720 We'd have to go to the edge of the islands for any hope to meet them. 437 00:36:28,940 --> 00:36:34,300 The silky shark is over three meters long and can be found in shoals of 438 00:36:34,300 --> 00:36:39,000 hundred. Normally placid, they get a bit frenzied when they're feeding. 439 00:36:40,940 --> 00:36:46,400 We knew large numbers of silky sharks congregated offshore, so our plan was to 440 00:36:46,400 --> 00:36:50,800 venture out and hope that they would come to us. For this dive, I chose the 441 00:36:50,800 --> 00:36:53,960 flexibility of a rebreather, which has wireless communications. 442 00:36:55,020 --> 00:36:58,980 Convenient, but sorry, it's harder to understand me than in the helmet. 443 00:37:47,470 --> 00:37:52,590 As we watched our turtle disappear off into the blue, familiar shapes began to 444 00:37:52,590 --> 00:37:54,610 appear from the haze before us. 445 00:38:31,980 --> 00:38:35,840 And almost as though a switch was thrown, their interest in us ceased. 446 00:38:36,100 --> 00:38:38,900 And as suddenly as they appeared, they disappeared. 447 00:38:39,160 --> 00:38:40,180 We followed. 448 00:38:40,440 --> 00:38:43,380 And it didn't take long to see why they vanished. 449 00:38:46,060 --> 00:38:48,560 A bait ball and a beauty. 450 00:38:49,020 --> 00:38:54,160 Bait fish, like sardines and anchovies, normally feed on plankton. And at times, 451 00:38:54,160 --> 00:38:57,800 they come right up to the surface. And that's when they're in big trouble. 452 00:38:58,350 --> 00:39:03,670 They become obvious targets for predators like these big -eyed jacks. 453 00:39:03,670 --> 00:39:06,510 creatures, the surface may as well be a brick wall. 454 00:39:06,730 --> 00:39:10,730 They can't get out, and now with the predators around, they can't go down 455 00:39:10,730 --> 00:39:15,650 either. In a futile defense, the little fish compact themselves tighter and 456 00:39:15,650 --> 00:39:16,650 tighter into a ball. 457 00:39:24,080 --> 00:39:29,300 The fish swim in frantic circles trying to escape as more and more of their 458 00:39:29,300 --> 00:39:31,180 tormentors arrive for the feast. 459 00:39:39,220 --> 00:39:45,080 It presents an unbelievable scene as Skipjack and Yellowfin Tuna crash into 460 00:39:45,080 --> 00:39:47,980 bait ball at speeds of over 60 kilometers per hour. 461 00:39:48,440 --> 00:39:51,760 The bait fish are utterly helpless in this situation. 462 00:39:52,180 --> 00:39:54,230 And then... The sharks arrived. 463 00:40:42,000 --> 00:40:47,240 Not only do the fish feed on such activity, masses of seabirds are also 464 00:40:47,240 --> 00:40:48,480 attracted to the massacre. 465 00:40:48,860 --> 00:40:54,460 On Cocos, there are over a hundred species of birds, including tern, 466 00:40:54,460 --> 00:40:56,840 birds, and several species of boobies. 467 00:41:07,160 --> 00:41:12,300 Cocos Island is full of seafarers' tales about pirate ships and strange 468 00:41:12,300 --> 00:41:18,520 creatures from the deep. But one story was worth checking out. A very big deep 469 00:41:18,520 --> 00:41:22,940 -water shark has been seen by divers on several occasions recently. 470 00:41:25,180 --> 00:41:30,340 It's thought to be a type of sand tiger shark, a beast with snaggly teeth and 471 00:41:30,340 --> 00:41:31,660 some seven meters long. 472 00:41:31,940 --> 00:41:33,940 Of course, I wanted to meet it. 473 00:41:36,160 --> 00:41:39,820 This is where our rebreather equipment would come into its own. 474 00:41:40,280 --> 00:41:45,700 To go deep, you'd need to have time to decompress, come up slowly at the end of 475 00:41:45,700 --> 00:41:49,380 your dive, and we'd need to be underwater for many hours. 476 00:41:50,120 --> 00:41:53,380 This was potentially our most hazardous dive. 477 00:41:54,280 --> 00:41:58,880 Because if anyone got hurt, for example with the bends, we would need a 478 00:41:58,880 --> 00:42:01,200 decompression chamber and we'd need it fast. 479 00:42:01,420 --> 00:42:05,360 And the nearest one was on the mainland over 450 kilometers away. 480 00:42:06,040 --> 00:42:09,840 But this crew was experienced, and we were well prepared for the dive. 481 00:42:12,530 --> 00:42:18,750 What a scene. Calm water, and below me, nothing but cobalt blue. 482 00:42:19,330 --> 00:42:21,210 This is going to be great. 483 00:42:22,510 --> 00:42:26,930 Again, the rebreather sound quality is not terrific, so bear with me. 484 00:43:18,600 --> 00:43:24,380 Purging my rebreather. At depth, the normal air we breathe can be dangerous, 485 00:43:24,380 --> 00:43:26,180 we swap our breathing gas. 486 00:43:26,720 --> 00:43:30,560 Safer, but it also has a very odd side effect. 487 00:43:31,120 --> 00:43:37,400 And that pretty much does it. So, I sound a bit like Donald Duck, probably, 488 00:43:37,400 --> 00:43:38,400 that's because... 489 00:44:00,680 --> 00:44:04,660 The wonderful thing for me about diving is that you can fly. 490 00:44:23,240 --> 00:44:28,540 But as you go deeper, you start to feel the pressure. But not just physically. 491 00:44:29,360 --> 00:44:31,160 Your mind starts racing. 492 00:44:31,960 --> 00:44:36,380 And if anything goes wrong, you must think very clearly. 493 00:44:37,040 --> 00:44:39,540 There's no quick way back to the surface. 494 00:44:47,460 --> 00:44:51,620 There we are. We made it. This is at 252 feet. 495 00:44:51,820 --> 00:44:53,060 And I can tell you this. 496 00:44:53,260 --> 00:44:54,760 It's different down here. 497 00:44:54,980 --> 00:44:58,640 Everything is cold and dark and steep. 498 00:44:58,840 --> 00:45:05,660 Just then, I thought I saw a large shape 499 00:45:05,660 --> 00:45:09,560 moving out in the gloom. I couldn't tell what it was, if anything. 500 00:45:10,460 --> 00:45:15,780 At this depth, your mind plays tricks on you, but we decided to investigate. 501 00:45:19,180 --> 00:45:24,940 Our seventh species in just one week is the deepwater sand tiger, and Cocos 502 00:45:24,940 --> 00:45:26,300 offers a great chance. 503 00:45:26,880 --> 00:45:30,320 because if it were not for the upwelling currents around the island, they would 504 00:45:30,320 --> 00:45:32,680 remain in deeper water and out of reach. 505 00:45:37,900 --> 00:45:43,900 Although I saw shadows everywhere, after a while, I began to feel I wasn't going 506 00:45:43,900 --> 00:45:44,900 to meet him. 507 00:45:45,020 --> 00:45:48,500 But in Cocos, there are always other payoffs. 508 00:45:49,620 --> 00:45:54,460 Okay, this is Black Coral. Very precious stuff in the jewelry industry in 509 00:45:54,460 --> 00:45:59,680 Hawaii. They harvest this stuff and make earrings, rings, all sorts of necklaces 510 00:45:59,680 --> 00:46:04,340 out of it. It's a bit of a shame, but this is what it looks like in its 511 00:46:04,340 --> 00:46:06,780 habitat. It's gorgeous stuff. 512 00:46:07,800 --> 00:46:11,040 Even the latest technology has its limits. 513 00:46:11,300 --> 00:46:15,820 As much as I wanted to find that shark, it wasn't going to be today. 514 00:46:17,980 --> 00:46:20,140 We love diving down this far. 515 00:46:21,380 --> 00:46:23,540 However, we've been down here pretty long. 516 00:46:24,330 --> 00:46:26,710 So now it's time to start heading up. 517 00:46:29,210 --> 00:46:34,310 After accepting the disappointment of not having seen the sand tiger shark, 518 00:46:34,310 --> 00:46:36,950 deep dive was about to pay off in a big way. 519 00:46:37,790 --> 00:46:42,970 During the long decompression ascent to the surface, we stopped to switch gases 520 00:46:42,970 --> 00:46:46,390 and were shocked by what was just above our heads. 521 00:47:02,320 --> 00:47:06,960 many sharks right here, day after day after day. 522 00:47:10,760 --> 00:47:12,780 These are all hammerheads. 523 00:47:13,200 --> 00:47:19,460 They're very social animals, and I have no clue what's really going on, so let's 524 00:47:19,460 --> 00:47:20,760 don't even think about it. 525 00:48:03,660 --> 00:48:04,620 It was 526 00:48:04,620 --> 00:48:11,300 an opportunity 527 00:48:11,300 --> 00:48:15,800 not to miss, but I wanted to put on my shallow water rig so you could 528 00:48:15,800 --> 00:48:16,800 me better. 529 00:48:16,910 --> 00:48:19,110 I just hoped to be there when I got back. 530 00:48:38,610 --> 00:48:39,630 That head! 531 00:48:40,110 --> 00:48:42,830 What on earth is that head all about? 532 00:48:43,710 --> 00:48:46,450 Imagine an airplane with a wing. 533 00:48:47,880 --> 00:48:53,760 A lot of experimental aircraft have little broad wings right in front of the 534 00:48:53,760 --> 00:48:59,920 airplane. Now, when the airplane tilts, this really helps it go up and down and 535 00:48:59,920 --> 00:49:05,100 up and down. The water is a very, very, very thick medium, much more dense than 536 00:49:05,100 --> 00:49:10,700 air. So you broaden this head, flatten it out, give it a sharp leading edge. 537 00:49:10,920 --> 00:49:16,380 All that hammerhead has to do is slightly tilt up or slightly tilt down, 538 00:49:16,380 --> 00:49:22,380 becomes extremely... maneuverable. So, in tight spaces, it can turn on a dime, 539 00:49:22,440 --> 00:49:28,120 it can go up and down. It really helps the maneuverability of a hammerhead to 540 00:49:28,120 --> 00:49:29,120 have that hit. 541 00:49:31,180 --> 00:49:33,120 Look at this hammerhead over here. 542 00:49:33,340 --> 00:49:35,920 You see how it's rolled over on its side? 543 00:49:37,040 --> 00:49:39,800 An angelfish. Those are king angelfish. 544 00:49:40,100 --> 00:49:44,500 They've come up off from the reef and they're picking parasites off of it. 545 00:49:44,500 --> 00:49:45,500 is a cleaning fish. 546 00:49:46,600 --> 00:49:49,580 That's one reason that they show up here, to get clean. 547 00:49:53,360 --> 00:49:58,020 You can see it's slowed down, rolls over on its side a little bit. 548 00:49:58,400 --> 00:50:04,660 And the fish coming off the reef, cleaning it. You see it's barely moving. 549 00:50:04,740 --> 00:50:09,100 That's a king angelfish on top of it. All of these little yellow fish are 550 00:50:09,100 --> 00:50:11,180 actually butterfly fish called barberfish. 551 00:50:11,560 --> 00:50:15,920 So there's two species, matter of fact, two families of fish. 552 00:50:16,880 --> 00:50:17,960 that shark right now. 553 00:50:19,980 --> 00:50:24,200 There must be, oh, I don't know, five or six butterfly fish cleaning them as we 554 00:50:24,200 --> 00:50:25,200 speak. 555 00:50:26,440 --> 00:50:28,920 Here comes a whole other group of butterfly fish. 556 00:50:34,340 --> 00:50:37,100 So they'll just come in in circles like this. 557 00:51:02,250 --> 00:51:06,950 moving too fast. You notice the fish didn't stop to clean that one. He just 558 00:51:06,950 --> 00:51:07,950 passed right by. 559 00:51:08,150 --> 00:51:10,670 They know when that shark wants to be 560 00:51:43,660 --> 00:51:46,060 What a dive. What a place. 561 00:51:46,360 --> 00:51:48,180 And what a finish. 562 00:51:48,480 --> 00:51:53,320 It was great to finally see Hammerheads so close up. 563 00:52:01,480 --> 00:52:07,560 During decompression, I took the time to look up at the tremendous views around 564 00:52:07,560 --> 00:52:13,480 these volcanic spires and was mesmerized one final time by the pristine... 565 00:52:13,500 --> 00:52:17,380 wonder of Cocos and its healthy abundance of life. 566 00:52:18,620 --> 00:52:21,600 Diving around Cocos is utterly amazing. 567 00:52:22,120 --> 00:52:26,700 It seems like there's more sharks per cubic meter of water here than anywhere 568 00:52:26,700 --> 00:52:27,700 else in the world. 569 00:52:27,820 --> 00:52:33,620 On nearly every dive, we found a different species and our goal of seven 570 00:52:33,620 --> 00:52:35,840 in seven days was almost fulfilled. 571 00:52:37,060 --> 00:52:40,340 We didn't find that elusive deep water sand tiger. 572 00:52:40,920 --> 00:52:43,600 But that just gives me an excuse to come back. 573 00:52:44,180 --> 00:52:45,180 And I will. 49447

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