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1
00:00:42,794 --> 00:00:45,631
An olive ridley turtle.
2
00:00:47,966 --> 00:00:52,512
She's resting in the shallows
off Costa Rica,
3
00:00:55,474 --> 00:00:58,518
having swum a thousand miles to be here.
4
00:01:09,321 --> 00:01:15,202
All because the eggs she carries
must be laid on dry land.
5
00:01:22,709 --> 00:01:25,879
Now she's returned
to the very same beach
6
00:01:26,046 --> 00:01:28,840
where she hatched 10 years ago.
7
00:01:38,183 --> 00:01:42,020
She must leave the safety
of her marine world
8
00:01:44,731 --> 00:01:48,235
and brave the alien world beyond.
9
00:02:13,385 --> 00:02:15,262
She's heavily laden
10
00:02:15,595 --> 00:02:20,309
but the future of the next generation
of her kind is at stake.
11
00:02:28,066 --> 00:02:32,988
All along the beach in a spectacle
that has remained unchanged
12
00:02:33,113 --> 00:02:34,781
for millions or years,
13
00:02:35,615 --> 00:02:38,910
mother sea turtles emerge from the ocean
14
00:02:41,913 --> 00:02:44,666
in their hundreds of thousands.
15
00:02:57,304 --> 00:03:00,974
Only those animals
that overcome the great challenges
16
00:03:01,099 --> 00:03:03,143
of both land and sea
17
00:03:03,477 --> 00:03:07,439
can make the most of life
here on the coast.
18
00:03:34,132 --> 00:03:39,888
Our shores are places of sudden changes
and rich rewards.
19
00:03:44,142 --> 00:03:48,355
The Galapagos Islands
in the tropical Pacific Ocean.
20
00:03:52,567 --> 00:03:56,154
Their barren coastline
looks inhospitable,
21
00:03:56,321 --> 00:04:01,159
but one group of animals has learnt
to use it to their advantage.
22
00:04:13,672 --> 00:04:15,006
Sea lions.
23
00:04:19,344 --> 00:04:20,679
Bachelors.
24
00:04:22,389 --> 00:04:24,933
They need to pile on the pounds
25
00:04:25,058 --> 00:04:29,396
as only the biggest males will attract
a female and manage to breed.
26
00:04:34,860 --> 00:04:38,363
If these young bulls
fail to grow big enough,
27
00:04:39,030 --> 00:04:43,368
they will remain exiled
on this isolated shoreline.
28
00:04:51,126 --> 00:04:55,380
So one hungry young bull
heads out alone.
29
00:05:26,953 --> 00:05:29,915
He's on the hunt for big game.
30
00:05:38,590 --> 00:05:40,008
Yellowfin tuna.
31
00:05:43,929 --> 00:05:46,181
Each weighing 60 kilos
32
00:05:48,642 --> 00:05:51,811
with a top speed of 40 miles an hour.
33
00:05:55,357 --> 00:05:58,860
He can't possibly catch one
in the open sea,
34
00:06:00,654 --> 00:06:02,781
but he has a plan.
35
00:06:05,617 --> 00:06:08,662
Ahead lies the entrance to the cove.
36
00:06:12,290 --> 00:06:14,125
He herds them towards it
37
00:06:22,300 --> 00:06:23,802
into his trap.
38
00:06:39,859 --> 00:06:42,487
Driving them into a dead end.
39
00:06:48,326 --> 00:06:50,161
But they give him the slip.
40
00:06:58,837 --> 00:07:00,255
He's failed.
41
00:07:10,223 --> 00:07:13,685
But there might be another way.
42
00:07:32,871 --> 00:07:35,540
Now they head off as a team
43
00:07:38,543 --> 00:07:41,463
to round up more tuna,
44
00:07:45,467 --> 00:07:48,094
driving them back into the cove.
45
00:08:02,233 --> 00:08:07,447
The sea lions fan out channelling
the tuna towards the bottleneck.
46
00:08:26,424 --> 00:08:29,260
Once again the tuna hit the dead end.
47
00:08:30,095 --> 00:08:33,056
But this time,
the young bull doubles back
48
00:08:33,139 --> 00:08:36,768
to act as a blocker
sealing off the exit.
49
00:09:03,044 --> 00:09:05,964
This time when the shoal
tries to escape,
50
00:09:06,047 --> 00:09:10,218
he blocks them and drives them back
into the next blind alley.
51
00:09:24,649 --> 00:09:28,361
The gang can now pick them off
one by one.
52
00:10:16,242 --> 00:10:18,536
This clever fishing technique,
53
00:10:18,620 --> 00:10:22,373
demanding foresight,
planning and cooperation,
54
00:10:22,957 --> 00:10:26,419
has only every been seen here
in the Galapagos.
55
00:10:29,631 --> 00:10:34,052
Each massive fish provides them
with five times more protein
56
00:10:34,135 --> 00:10:35,970
than a normal day's hunting.
57
00:10:40,975 --> 00:10:44,437
Finally, the young bull leaves his post
58
00:10:47,649 --> 00:10:49,651
to claim his reward.
59
00:11:05,250 --> 00:11:08,086
On a diet of protein-rich tuna,
60
00:11:08,294 --> 00:11:12,507
he's well on the way to becoming
a full-sized breeding bull.
61
00:11:20,682 --> 00:11:22,183
By using this cove,
62
00:11:22,267 --> 00:11:26,855
these Galapagos sea lions
have made the most of the opportunities
63
00:11:26,938 --> 00:11:30,775
that occur
where the coast's two worlds meet.
64
00:11:40,493 --> 00:11:45,206
Coasts are the most swiftly changing
of all ocean habitats
65
00:11:46,624 --> 00:11:49,043
because of the tides.
66
00:11:57,385 --> 00:12:02,724
Tides are created as the moon's gravity
pulls at the sea.
67
00:12:13,151 --> 00:12:18,573
As the moon circles our planet,
the seas rise and fall.
68
00:12:20,158 --> 00:12:22,160
Typically twice a day,
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00:12:24,078 --> 00:12:28,583
creating the most constantly dynamic
landscapes on Earth.
70
00:12:39,177 --> 00:12:44,849
Nowhere else do sea-living creatures
face such changeable conditions.
71
00:12:48,019 --> 00:12:52,899
With the daily risk of drying out
and being scorched by the sun.
72
00:12:59,906 --> 00:13:02,784
Where the tide retreats
across a rocky shore,
73
00:13:02,909 --> 00:13:06,704
it can leave behind a temporary oasis.
74
00:13:14,420 --> 00:13:16,214
A rock pool.
75
00:13:27,892 --> 00:13:30,979
Seemingly, it's a haven of calm.
76
00:13:33,564 --> 00:13:35,066
But not for long.
77
00:13:37,068 --> 00:13:42,115
Turning minutes into seconds
reveals unexpected dramas.
78
00:13:55,837 --> 00:14:00,550
In rock pools, grazers, scavengers
and filter feeders
79
00:14:00,633 --> 00:14:03,469
must all make the most
of the few short hours
80
00:14:03,594 --> 00:14:05,430
before the tide returns.
81
00:14:23,281 --> 00:14:26,284
Anemones gulp down
anything they can reach.
82
00:14:28,786 --> 00:14:32,290
Though some meals
are harder to digest than others.
83
00:14:41,841 --> 00:14:46,637
These magical worlds
soon become battlegrounds.
84
00:14:50,349 --> 00:14:56,355
A deadly predator with five arms
and on the underside a mouth.
85
00:15:00,026 --> 00:15:01,903
The ochre starfish.
86
00:15:06,741 --> 00:15:09,660
And it's in search of limpets.
87
00:15:29,430 --> 00:15:32,266
For some, there is no escape.
88
00:15:42,693 --> 00:15:46,197
But other limpets have a secret defence.
89
00:15:48,699 --> 00:15:51,744
They deploy a slippery shield
90
00:15:54,205 --> 00:15:57,416
which allows them to slide to safety.
91
00:16:02,463 --> 00:16:06,425
And this limpet
has its own personal bodyguard.
92
00:16:15,893 --> 00:16:19,230
A scale worm with a nasty nip.
93
00:16:25,444 --> 00:16:29,657
The starfish prefers food
that doesn't bite back.
94
00:16:31,242 --> 00:16:32,702
The limpet carries on,
95
00:16:32,785 --> 00:16:36,622
its bodyguard
tucked safe under its shell.
96
00:16:39,959 --> 00:16:41,586
But there is one creature
97
00:16:42,295 --> 00:16:45,590
that limpets have no defence against.
98
00:16:47,925 --> 00:16:49,427
A clingfish.
99
00:16:51,929 --> 00:16:55,641
It has teeth
that can lever under the shell
100
00:16:57,310 --> 00:17:00,146
and twist the limpet off
like a bottle top.
101
00:17:05,109 --> 00:17:07,486
The clingfish then swallows it
102
00:17:08,112 --> 00:17:10,156
shell and all.
103
00:17:18,289 --> 00:17:22,919
Rock pool dramas like these
last just a few short hours
104
00:17:23,002 --> 00:17:25,463
before the tide returns.
105
00:17:29,675 --> 00:17:34,972
Every day the sea becomes land
and the land becomes sea.
106
00:17:42,480 --> 00:17:44,982
Bringing new opportunities.
107
00:17:49,570 --> 00:17:51,572
A Sally Lightfoot crab,
108
00:17:54,742 --> 00:17:59,247
one of thousands of shore crabs
just waiting for their moment.
109
00:18:02,500 --> 00:18:06,712
Every day they gather
on the tropical shores of Brazil,
110
00:18:09,674 --> 00:18:12,510
waiting for the tide to go out.
111
00:18:21,394 --> 00:18:24,355
Which exposes their feeding ground,
112
00:18:25,398 --> 00:18:29,277
seaweed covered rocks,
a hundred metres from the shore.
113
00:18:39,704 --> 00:18:43,416
Getting there is a race
against the tide.
114
00:18:50,298 --> 00:18:52,425
They leap from rock to rock.
115
00:19:07,106 --> 00:19:10,443
These crabs seem
to be afraid of the water.
116
00:19:23,998 --> 00:19:26,083
And for good reason.
117
00:19:38,346 --> 00:19:40,264
The Moray eel.
118
00:19:42,516 --> 00:19:46,645
The chain Moray
is a specialist crab hunter.
119
00:19:52,360 --> 00:19:57,198
It's blunt teeth can easily grip
and crush a crab's shell.
120
00:20:03,120 --> 00:20:05,456
It's the crab's deadliest enemy.
121
00:20:17,134 --> 00:20:20,805
But the crab's feeding grounds
are still a long way off.
122
00:20:27,520 --> 00:20:29,188
They must press on.
123
00:20:53,003 --> 00:20:54,422
Halfway.
124
00:21:00,010 --> 00:21:02,763
But their enemy has other ideas.
125
00:21:08,436 --> 00:21:10,020
Crossing the land
126
00:21:16,861 --> 00:21:19,530
to reset the ambush.
127
00:21:23,075 --> 00:21:26,454
To feed, the crabs must keep going.
128
00:21:33,210 --> 00:21:35,087
But nowhere is safe.
129
00:21:39,550 --> 00:21:42,720
An octopus. Also a crab killer.
130
00:22:08,996 --> 00:22:11,081
The crabs make a dash for it.
131
00:22:39,443 --> 00:22:40,611
Made it.
132
00:22:49,995 --> 00:22:51,872
Risking life and limb
133
00:22:52,206 --> 00:22:55,501
to graze on these seaweed pastures.
134
00:22:58,837 --> 00:23:03,050
But in two hours' time
when the tide starts to turn,
135
00:23:04,051 --> 00:23:07,721
they will have to run the gauntlet
all over again.
136
00:23:17,648 --> 00:23:22,069
Tides are not the only force
to have an impact on the coast.
137
00:23:42,881 --> 00:23:46,552
The greatest waves
originate far out to sea
138
00:23:46,719 --> 00:23:50,681
and roll in towards the coast,
growing as they come.
139
00:24:03,694 --> 00:24:08,073
As the shallowing sea floor
drags at their underside,
140
00:24:08,616 --> 00:24:12,036
their crests rise
up to a hundred feet high,
141
00:24:12,411 --> 00:24:14,955
topple over and break.
142
00:24:22,713 --> 00:24:25,966
Many of the biggest surfed waves
in the world
143
00:24:26,091 --> 00:24:28,969
are formed off Nazare in Portugal.
144
00:24:45,152 --> 00:24:49,865
Every day along this coast,
the impact of the waves is equivalent
145
00:24:49,948 --> 00:24:54,078
to one and a half million tonnes of TNT.
146
00:25:16,767 --> 00:25:21,814
Wave power gradually moulds
and reshapes our coasts.
147
00:25:25,776 --> 00:25:27,361
In some parts of Europe,
148
00:25:27,444 --> 00:25:32,533
waves wear away as much as three metres
of coastline each year.
149
00:25:40,207 --> 00:25:43,460
The rate at which the waves
reshape the rock
150
00:25:43,544 --> 00:25:45,546
depends on its hardness.
151
00:25:47,339 --> 00:25:50,050
Where soft rock lies below hard,
152
00:25:50,175 --> 00:25:52,386
dramatic arches are craved.
153
00:26:10,487 --> 00:26:12,531
It's an endless assault
154
00:26:12,656 --> 00:26:16,702
that gradually sculpts
vaulted cathedrals of stone
155
00:26:16,827 --> 00:26:19,163
as here in northern Spain.
156
00:26:31,175 --> 00:26:34,928
And wave power
creates towering fortresses
157
00:26:35,053 --> 00:26:37,181
like these cliffs in these Arctic,
158
00:26:37,264 --> 00:26:41,101
home to tens of thousands
of breeding seabirds.
159
00:26:45,856 --> 00:26:50,194
The faces of the cliffs
are accessible only from the air
160
00:26:50,277 --> 00:26:54,239
and have plenty of nooks and crannies
for those that can get there.
161
00:26:59,536 --> 00:27:04,541
But to feed, seabirds must still master
the ocean world beyond.
162
00:27:09,880 --> 00:27:11,048
The puffin.
163
00:27:15,093 --> 00:27:16,595
He's a fisherman...
164
00:27:18,096 --> 00:27:19,556
...and a father.
165
00:27:23,977 --> 00:27:26,396
He has a mate for life.
166
00:27:33,654 --> 00:27:37,866
Both share the burden of raising
their week-old chick,
167
00:27:37,950 --> 00:27:42,162
their puffling who needs
five square meals a day.
168
00:27:44,915 --> 00:27:48,001
The parents alternate fishing trips.
169
00:27:51,463 --> 00:27:53,173
It's dad's turn.
170
00:28:16,655 --> 00:28:18,991
When fish stocks are low,
171
00:28:19,116 --> 00:28:23,287
puffins must fly as much as 30 miles
172
00:28:24,621 --> 00:28:27,291
to reach the good fishing grounds.
173
00:28:39,803 --> 00:28:43,974
Once there,
they plunge into another world.
174
00:28:52,649 --> 00:28:56,820
Good fishing spots are hard to come by,
and they have company.
175
00:28:58,822 --> 00:29:00,198
Guillemots.
176
00:29:07,831 --> 00:29:11,835
Like the puffin, their wings are short
and good for diving.
177
00:29:14,838 --> 00:29:17,883
Puffins can hold their breath
for over a minute
178
00:29:18,091 --> 00:29:21,178
and dive as deep as 40 metres.
179
00:29:26,683 --> 00:29:28,101
A catch.
180
00:29:47,913 --> 00:29:50,874
But it's a long way home.
181
00:30:04,763 --> 00:30:09,434
After an exhausting round trip
of almost 60 miles,
182
00:30:09,601 --> 00:30:11,895
this puffin's nearly made it.
183
00:30:14,231 --> 00:30:16,733
But there are pirates on this coast.
184
00:30:20,404 --> 00:30:22,114
Arctic Skuas.
185
00:30:48,181 --> 00:30:51,852
All around returning parents
are being robbed.
186
00:31:19,129 --> 00:31:22,132
The skuas' long rake back wings
187
00:31:22,215 --> 00:31:24,551
make them faster and more manoeuvrable.
188
00:32:04,549 --> 00:32:07,552
Puffins must choose their moment wisely.
189
00:32:28,949 --> 00:32:30,367
A near miss.
190
00:32:48,718 --> 00:32:51,888
A last desperate burst of speed,
191
00:32:54,432 --> 00:32:55,934
and it's made it.
192
00:33:23,420 --> 00:33:27,591
Safely home
after a three-hour round trip...
193
00:33:35,265 --> 00:33:37,934
...where his patient partner is waiting.
194
00:33:54,951 --> 00:33:58,038
Today their puffling will eat.
195
00:34:05,045 --> 00:34:07,964
But where fish numbers are in decline,
196
00:34:08,048 --> 00:34:12,510
many puffins now find it hard
to get enough food for their chicks.
197
00:34:15,180 --> 00:34:17,307
In the changing seas of today,
198
00:34:17,474 --> 00:34:21,478
it can be even harder
to be a successful puffin parent.
199
00:34:32,739 --> 00:34:37,035
Overcoming the challenges
of two worlds is seldom easy.
200
00:34:39,162 --> 00:34:43,917
One marine creature has virtually
abandoned the sea altogether.
201
00:34:47,003 --> 00:34:49,798
On a few remote pacific islands,
202
00:34:49,881 --> 00:34:53,510
lives the most terrestrial fish
on the planet.
203
00:34:59,683 --> 00:35:03,270
At the top of this metre-high
limestone cliff,
204
00:35:07,190 --> 00:35:11,861
an eight-centimetre long blenny
has chosen a nest hole.
205
00:35:18,535 --> 00:35:22,038
Up here, he can graze
on the abundant algae
206
00:35:22,205 --> 00:35:25,375
without any competition
from sea-going fish.
207
00:35:27,210 --> 00:35:29,546
The females are feeding beneath him.
208
00:35:34,050 --> 00:35:36,553
He's keen to attract their attention,
209
00:35:39,472 --> 00:35:42,559
but they are busy moisturising.
210
00:35:42,976 --> 00:35:47,063
Staying damp is essential
as they breathe through their skin.
211
00:35:52,235 --> 00:35:56,740
To make himself conspicuous,
he turns black
212
00:36:01,161 --> 00:36:03,830
and flashes his orange fin.
213
00:36:05,749 --> 00:36:07,417
He catches her eye.
214
00:36:10,295 --> 00:36:13,256
But these Pacific leaping blennies,
215
00:36:13,340 --> 00:36:16,092
seem afraid of the waves.
216
00:36:19,596 --> 00:36:21,598
They're poor swimmers
217
00:36:22,474 --> 00:36:24,851
and will be easy prey in the sea.
218
00:36:27,687 --> 00:36:29,939
Time to try again.
219
00:36:33,693 --> 00:36:34,944
She's tempted.
220
00:36:40,116 --> 00:36:43,953
But once again distracted by a wave.
221
00:37:08,478 --> 00:37:11,022
The male just won't give up.
222
00:37:23,910 --> 00:37:25,745
Finally, she's hooked.
223
00:37:30,417 --> 00:37:32,001
He makes way...
224
00:37:34,712 --> 00:37:37,590
so she can enter his cave.
225
00:37:41,845 --> 00:37:44,764
And he encourages her to lay her eggs
226
00:37:44,848 --> 00:37:47,600
with his seductive dance.
227
00:38:02,532 --> 00:38:06,953
He then fertilizes them
in the safety of his nest.
228
00:38:17,881 --> 00:38:22,093
The blenny has given up the sea
for a life on land.
229
00:38:24,554 --> 00:38:28,558
Others have made
an even more successful move
230
00:38:28,641 --> 00:38:31,102
but in a different direction.
231
00:38:38,651 --> 00:38:41,321
Penguins have abandoned flying
232
00:38:41,404 --> 00:38:44,991
and instead spend
most of their lives swimming.
233
00:38:46,910 --> 00:38:50,288
Their sleek survival suits
of tightly packed feathers
234
00:38:50,413 --> 00:38:53,082
are perfect for these freezing waters.
235
00:38:55,084 --> 00:38:58,171
Yet, they must still come ashore
once a year.
236
00:39:12,810 --> 00:39:17,857
South Georgia, an island wilderness
close to Antarctica.
237
00:39:28,826 --> 00:39:32,830
Each spring, its beaches become
the busiest on Earth
238
00:39:32,956 --> 00:39:36,960
as hundreds of thousands
of king penguins return here.
239
00:39:47,136 --> 00:39:49,013
They're heading for the colony.
240
00:39:56,354 --> 00:40:01,067
But in their way lies the biggest wall
of blubber on the planet.
241
00:40:05,530 --> 00:40:07,490
Elephant seals.
242
00:40:15,540 --> 00:40:17,667
It's the breeding season
243
00:40:17,834 --> 00:40:22,755
and the four-tonne bulls are fighting
for control of their harems.
244
00:40:26,009 --> 00:40:28,678
Best to wait for them to calm down.
245
00:40:44,193 --> 00:40:46,613
He can't fly over this barrier,
246
00:40:46,696 --> 00:40:50,783
so he will have to walk
as unobtrusively as possible.
247
00:40:54,537 --> 00:40:58,958
And hope that sleeping giants
will continue to lie.
248
00:41:11,054 --> 00:41:12,096
Careful.
249
00:41:31,574 --> 00:41:33,242
This could be tricky.
250
00:41:51,803 --> 00:41:54,472
A rival bull mounts a challenge.
251
00:41:56,641 --> 00:41:59,769
The penguins could be caught
in the crossfire.
252
00:42:32,218 --> 00:42:34,971
Eight tonnes of blubber collide.
253
00:42:56,993 --> 00:43:00,663
The towering beach master is victorious.
254
00:43:08,004 --> 00:43:11,507
In the confusion,
this penguin slips through.
255
00:43:14,594 --> 00:43:18,181
Ahead are 40,000 chicks.
256
00:43:22,059 --> 00:43:24,353
Hungry and over-excited.
257
00:43:40,620 --> 00:43:43,873
But not every penguin
has a chick to feed.
258
00:43:44,248 --> 00:43:46,250
That's not why they're here.
259
00:43:50,463 --> 00:43:52,423
There is another reason.
260
00:43:54,383 --> 00:43:59,055
There is a trial of endurance
that every penguin must face,
261
00:44:00,765 --> 00:44:04,393
and it starts with a persistent itch.
262
00:44:11,901 --> 00:44:14,529
His survival suit has been worn thin
263
00:44:14,612 --> 00:44:17,657
by months of swimming
in the rough southern ocean.
264
00:44:20,284 --> 00:44:22,286
His solution is drastic.
265
00:44:26,415 --> 00:44:30,294
Shed all four layers of feathers
as quickly as possible.
266
00:44:35,591 --> 00:44:39,345
The process is known
as a catastrophic moult.
267
00:44:45,768 --> 00:44:48,104
Until their feathers regrow,
268
00:44:48,187 --> 00:44:51,774
penguins will remain rooted to the spot.
269
00:45:15,464 --> 00:45:17,717
Having starved for a month,
270
00:45:17,884 --> 00:45:22,388
they're now fully waterproofed
and insulated once more.
271
00:45:38,321 --> 00:45:43,993
Lean, hungry and eager to return
to a life at sea.
272
00:46:01,427 --> 00:46:03,846
Thanks to their waterproof plumage,
273
00:46:04,013 --> 00:46:07,183
penguins are able to make
the most of both worlds
274
00:46:07,266 --> 00:46:10,603
even in some of the harshest conditions
on Earth.
275
00:46:26,744 --> 00:46:28,371
The coasts of South Georgia
276
00:46:28,454 --> 00:46:31,374
are currently protected
by their remoteness.
277
00:46:34,043 --> 00:46:37,380
Other coastlines
are much more vulnerable,
278
00:46:42,301 --> 00:46:46,097
and they are now changing
faster than ever before.
279
00:46:50,893 --> 00:46:55,314
Two thirds of our major cities
are on our coasts.
280
00:46:58,234 --> 00:47:00,861
It's estimated that in the next decade,
281
00:47:00,945 --> 00:47:05,658
we can expect 10%
of the world's remaining wild shores
282
00:47:05,741 --> 00:47:08,828
to be taken over by human development.
283
00:47:18,462 --> 00:47:21,674
Yet every year,
just off Florida's Palm Beach
284
00:47:22,466 --> 00:47:26,595
and extraordinary spectacle appears
almost unnoticed.
285
00:47:33,185 --> 00:47:37,648
The biggest gathering of coastal sharks
on the planet.
286
00:47:42,945 --> 00:47:45,781
Spinners and blacktips.
287
00:47:51,037 --> 00:47:52,705
Ten thousand of them.
288
00:48:03,466 --> 00:48:07,344
Every January,
they seek out these warm shallows
289
00:48:07,803 --> 00:48:11,223
as a stopover
on their migration northwards.
290
00:48:17,980 --> 00:48:22,860
Sharks have been gathering here
since long before people arrived.
291
00:48:34,163 --> 00:48:37,500
But today, they face levels of pollution
292
00:48:38,042 --> 00:48:42,171
and habitat degradation
as well as fishing pressures.
293
00:48:42,338 --> 00:48:46,175
that their ancestors
would never have experienced.
294
00:48:50,012 --> 00:48:53,307
It's not longer enough
for coastal creatures
295
00:48:53,390 --> 00:48:55,851
to master their own worlds.
296
00:49:04,360 --> 00:49:10,366
Now they must face the many challenges
that come from our world, too.
297
00:49:20,292 --> 00:49:21,710
Next time...
298
00:49:22,169 --> 00:49:26,966
We travel the world to uncover
the biggest issues facing the ocean...
299
00:49:30,219 --> 00:49:32,054
meet the passionate people
300
00:49:32,138 --> 00:49:34,932
who've devoted their lives
to protecting it
301
00:49:36,392 --> 00:49:41,355
and discover what the future holds
for our blue planet.
25667
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