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<i>[thudding]</i>

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<i>[gentle music playing]</i>

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<i>[fluttering]</i>

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<i>[narrator]</i> Imagine you're cast at birth
into a galaxy of tiny drifting creatures.

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<i>A speck lost in the ocean.</i>

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<i>You never met your mother or father.</i>

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<i>You have no one to show you</i>
<i>where to go or what to do.</i>

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<i>That's how life begins</i>
<i>for this little sharpnose pufferfish.</i>

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<i>We'll call him Puff.</i>

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<i>Just a couple of months old,</i>
<i>he's smaller than a fingernail.</i>

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<i>Adrift in the ocean,</i>
<i>headed for an uncertain future.</i>

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<i>This is Puff's world.</i>

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<i>A vibrant coral reef,</i>
<i>home to thousands of creatures.</i>

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<i>But to see what Puff sees,</i>
<i>you have to look closer.</i>

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<i>Even closer.</i>

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<i>Because the story of every coral reef</i>
<i>starts with its tiniest creatures.</i>

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<i>For the first time, we have opened</i>
<i>a window to their incredible micro-verse.</i>

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<i>A world where drama unfolds</i>
<i>on scales too small…</i>

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<i>too fast…</i>

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<i>or too slow for the human eye to perceive.</i>

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<i>And from Puff's tiny point of view,</i>

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<i>it must seem almost magical.</i>

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<i>The reef as we've never seen it before.</i>

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<i>[soft piano playing]</i>

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00:02:54.625 --> 00:02:56.625 line:5%
<i>[whimsical music playing]</i>

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<i>[narrator] </i>To the naked eye, line:5%
the open ocean may seem lifeless,

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00:03:09.333 --> 00:03:13.791 line:5%
<i>but when you look closer,</i>
<i>billions of tiny creatures are revealed.</i>

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<i>Some so minute</i>
<i>that hundreds of individuals</i>

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<i>would fit in a single drop of water.</i>

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<i>This is where Puff</i>
<i>begins his life journey.</i>

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<i>He hatched from an egg on the reef</i>
<i>and drifted with the current out to sea,</i>

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<i>to feed on tiny plankton.</i>

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<i>This is how many reef fish</i>
<i>begin their lives.</i>

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<i>[dramatic music playing]</i>

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<i>[narrator] </i>But within months,

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<i>these microscopic morsels</i>
<i>are no longer enough to sustain him.</i>

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<i>He needs to find bigger things to eat.</i>

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<i>And that poses a problem</i>
<i>as big as the ocean.</i>

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<i>How will Puff find his way back</i>
<i>to the reef?</i>

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<i>Something amazing happens when lots</i>
<i>of creatures gather in the same place.</i>

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<i>Crowds make noise,</i>

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<i>and a coral reef is a busy place.</i>

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<i>Sound can travel for miles underwater.</i>

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<i>All Puff has to do is listen.</i>

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<i>Most of what you see</i>
<i>here is built by animals</i>

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<i>smaller than the tip of your finger.</i>

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<i>Thousands of lives</i>
<i>and millions of stories are unfolding.</i>

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<i>Don't believe me?</i>

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<i>Try looking from Puff's perspective.</i>

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<i>The smallest of these animals</i>
<i>are no larger than a grain of sand.</i>

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<i>[ethereal music playing]</i>

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<i>[narrator] </i>Puff's new world
is a micro-verse of tiny creatures

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<i>that live their lives</i>
<i>unnoticed by giants like us.</i>

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<i>[unsettling music plays]</i>

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<i>[muffled breathing]</i>

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<i>[narrator]</i> At around three months of age,
Puff is only the size of a jellybean.

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<i>That's not just daunting,</i>

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<i>it's dangerous.</i>

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<i>Fortunately for Puff, he has</i>
<i>an ingenious way of defending himself.</i>

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<i>He's toxic.</i>

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<i>And he comes with a warning label.</i>

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<i>The markings on his body say,</i>

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<i>"Eat me, and you'll regret it."</i>

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<i>But being poisonous</i>
<i>doesn't make him invincible.</i>

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<i>And nearby, a predator lurks.</i>

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<i>A lionfish.</i>

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<i>This ferocious hunter's dazzling fins</i>

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<i>are perfect for herding small prey</i>
<i>into tight spots.</i>

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<i>[unsettling music playing]</i>

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<i>[soft music playing]</i>

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<i>[narrator] </i>Most young reef fish
don't survive their first year of life.

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<i>Luckily for Puff,</i>

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<i>the coral creates a maze</i>
<i>of tiny passageways</i>

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<i>where a baby fish can hide for the night.</i>

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<i>Out of sight,</i>

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<i>and off the menu.</i>

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<i>As Puff sleeps, the foundations</i>
<i>of his world begin to stir.</i>

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<i>[suspenseful music playing]</i>

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<i>[narrator] </i>Every year,

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<i>the moon, the tides,</i>
<i>and the water temperature</i>

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<i>all signal to billions of corals</i>

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<i>that tonight is the night</i>
<i>to cast the young to the sea.</i>

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<i>At the mouths of tiny coral polyps,</i>

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<i>minuscule bundles</i>
<i>of eggs and sperm appear.</i>

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<i>In near perfect synchronicity,</i>
<i>they lift off…</i>

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<i>and journey to the surface.</i>

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<i>The bundles drift with the current</i>
<i>and mix with the spawn</i>

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<i>of thousands of other coral colonies.</i>

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<i>If among the billions of eggs</i>
<i>released tonight</i>

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<i>one should meet its match…</i>

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<i>something extraordinary happens.</i>

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<i>A microscopic larva forms,</i>

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<i>a barely visible creature</i>
<i>on a quest to build a new coral colony.</i>

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<i>It drifts for days</i>

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<i>until it hears the call of the reef.</i>

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<i>And dives,</i>

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<i>braving a minefield</i>
<i>of predators and traps.</i>

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<i>[sinister music playing]</i>

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<i>[narrator]</i>
When you're the size of a speck,

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<i>a three-centimeter-long shrimp</i>
<i>can be monstrous.</i>

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<i>[eerie music playing]</i>

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<i>[narrator] </i>On the reef, the larva searches
for a perfect place to make its home.

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<i>When it finds the right spot,</i>

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<i>it transforms</i>

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<i>from a free-swimming larva</i>
<i>into a young coral.</i>

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<i>As it grows,</i>
<i>its skeleton forms part of the reef.</i>

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<i>With the help</i>
<i>of other tiny construction workers,</i>

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<i>the corals build living structures</i>

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<i>that create homes</i>
<i>for countless other creatures.</i>

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<i>It takes hundreds,</i>
<i>sometimes thousands of years,</i>

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<i>for generations of tiny reef-builders</i>
<i>to construct Puff's coral metropolis.</i>

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<i>Inside his reef hiding place,</i>
<i>Puff is safe for now.</i>

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<i>But he needs to brave the predators</i>
<i>and head out to find food.</i>

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<i>And once again, the corals help out.</i>

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<i>Because corals produce energy</i>
<i>that feeds the animals of the reef.</i>

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<i>It all starts with single-celled,</i>
<i>plant-like creatures</i>

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<i>living within the corals,</i>
<i>the zooxanthellae.</i>

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<i>Don't let that big name fool you.</i>

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<i>Everything here, really small.</i>

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<i>These little guys</i>
<i>are the coral's life partners,</i>

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<i>harvesting energy from sunlight</i>
<i>to feed their coral hosts.</i>

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<i>And as the corals grow and thrive,</i>

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<i>they share their energy</i>
<i>with the rest of the reef.</i>

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<i>Some creatures consume the energy directly</i>
<i>by eating the coral.</i>

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<i>This baby crown-of-thorns starfish</i>

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<i>uses tiny eyespots on the end</i>
<i>of each arm to locate coral colonies.</i>

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<i>A keen sense of underwater smell</i>
<i>helps it find the right species.</i>

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<i>And it devours the coral polyps,</i>
<i>leaving a scar on the reef.</i>

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<i>Not all inhabitants</i>
<i>feed on the coral directly.</i>

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<i>If they did,</i>
<i>they'd soon demolish their reef city.</i>

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<i>Fortunately, there's another way</i>
<i>corals supply food.</i>

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<i>They do it with slime.</i>

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<i>Corals shed mucus too fine</i>
<i>for creatures like Puff to eat,</i>

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<i>but an ancient group of organisms</i>
<i>makes sure this energy is not lost.</i>

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<i>Sponges.</i>

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<i>To the naked eye,</i>
<i>they may appear motionless,</i>

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<i>but if you speed up time,</i>
<i>their vital role in the reef is revealed.</i>

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<i>Sponges pump huge volumes of water</i>
<i>through their bodies,</i>

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<i>filtering out the coral mucus</i>
<i>and using the energy to grow.</i>

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<i>[soft music playing]</i>

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<i>[narrator]</i> After they've had their fill,

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<i>the sponges concentrate organic waste</i>
<i>on their surfaces,</i>

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<i>creating a bite-sized buffet</i>

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<i>for tiny creatures to feed on.</i>

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<i>And those animals</i>
<i>are eaten by slightly bigger creatures.</i>

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<i>Oh no. No, no, no. Just slightly bigger?</i>
<i>No, that's</i>…<i> That's way too big.</i>

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<i>That's huge. That's massive.</i>

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<i>This… yes.</i>

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<i>That's better.</i>

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<i>Some of the recycled sponge food</i>
<i>also washes up the water column</i>

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<i>where it's captured and consumed</i>
<i>by filter feeders.</i>

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<i>Like the Christmas tree worm.</i>

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<i>Easily the most festive worm of the sea.</i>

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<i>[mellow music playing]</i>

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<i>[narrator]</i>
This almond-sized porcelain crab

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<i>uses feathery claws</i>
<i>to capture tiny particles of food</i>

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<i>from the water.</i>

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<i>Down here,</i>
<i>every surface is covered with life.</i>

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<i>Nothing goes to waste.</i>

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<i>On the back of a sea snail</i>
<i>the size of an olive,</i>

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<i>even smaller creatures make their home.</i>

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<i>Without these little creatures recycling</i>
<i>the energy captured by the corals,</i>

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<i>the larger ones would have nothing to eat.</i>

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<i>Life on the reef is dependent on</i>
<i>thousands of creatures working together,</i>

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<i>each with a vital role to play.</i>

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<i>[whimsical music playing]</i>

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<i>[narrator] </i>Puff is perfectly adapted
to hunt in this tiny world.

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<i>But the grim fact is,</i>
<i>most things that eat can also be eaten.</i>

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<i>Not all corals are harmless.</i>

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<i>Some are predators…</i>

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<i>their tentacles covered in deadly cells</i>

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<i>that harpoon</i>
<i>and paralyze speck-sized prey.</i>

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<i>[ominous music playing]</i>

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<i>[ominous music intensifies]</i>

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<i>[narrator] </i>If he's going to survive
the depths of the reef,

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<i>Puff must learn all the secrets</i>
<i>of its dark recesses.</i>

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<i>Some alleyways</i>
<i>are more treacherous than others.</i>

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<i>[sinister music playing]</i>

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<i>[narrator] </i>This anglerfish
is about as long as your thumb.

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<i>A giant in this micro world.</i>

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<i>[mellow music playing]</i>

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<i>[ominous music playing]</i>

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<i>[vibrant music playing]</i>

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<i>[narrator] </i>Puff's discovered
his pufferfish superpower.

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<i>He can blow up like a balloon</i>
<i>in a fraction of a second,</i>

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<i>a trick that has just saved his life.</i>

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<i>Being one of the smallest fish on the reef</i>
<i>means Puff is in constant danger.</i>

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<i>[unsettling music plays]</i>

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<i>[narrator] </i>His superpower may keep
predators at bay for a while,

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<i>but other forces are beyond his control.</i>

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<i>[thunder rumbling]</i>

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<i>[thunder cracking]</i>

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<i>[narrator] </i>Above the waves, a storm brews
in a world that Puff can never know.

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<i>Its brutal force delves deep</i>
<i>into the ocean.</i>

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<i>[swishing]</i>

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<i>[muffled thunder rumbling]</i>

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<i>[eerie music playing]</i>

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<i>[narrator] </i>Despite its abundance of food,

201
00:26:26.708 --> 00:26:30.000
<i>the reef remains a treacherous place</i>
<i>for a baby fish.</i>

202
00:26:34.875 --> 00:26:39.583
<i>Instinct tells him there may be</i>
<i>safer waters beyond the coral metropolis.</i>

203
00:26:43.500 --> 00:26:47.375
<i>But to find this haven,</i>
<i>he must cross a strange, new world.</i>

204
00:26:48.500 --> 00:26:50.000
<i>The sand flats.</i>

205
00:26:54.208 --> 00:26:58.041
<i>Among the sand grains,</i>
<i>it's every crab for herself.</i>

206
00:26:59.125 --> 00:27:01.125
<i>[mellow music playing]</i>

207
00:27:08.875 --> 00:27:13.250
<i>[narrator] </i>The plains are home<i> </i>to
creatures that scavenge, sift, and burrow.

208
00:27:27.166 --> 00:27:29.166
<i>[suspenseful music playing]</i>

209
00:27:57.958 --> 00:28:02.125
<i>[narrator] </i>Out here,
it's a fish-eat-brittle-star world.

210
00:28:15.416 --> 00:28:16.500
<i>In the dunes,</i>

211
00:28:16.583 --> 00:28:21.333
<i>Puff finds a mollusk hauling its shell</i>
<i>through a garden of walking dendros.</i>

212
00:28:25.625 --> 00:28:28.541
<i>These walnut-sized corals</i>
<i>live on the sand,</i>

213
00:28:28.625 --> 00:28:32.250
<i>absorbing sunlight</i>
<i>and feeding on tiny creatures.</i>

214
00:28:34.000 --> 00:28:36.583
<i>But it isn't all sun-baking and snacks.</i>

215
00:28:45.500 --> 00:28:49.166
<i>They're in constant danger</i>
<i>of being toppled or buried alive.</i>

216
00:28:50.166 --> 00:28:53.208
<i>A death sentence</i>
<i>for a coral that needs sunlight.</i>

217
00:28:58.250 --> 00:29:01.250
<i>But sometimes help comes</i>
<i>from unexpected places.</i>

218
00:29:02.375 --> 00:29:04.583
<i>Like, really unexpected places.</i>

219
00:29:05.250 --> 00:29:08.166
<i>In this case, from a wormhole.</i>

220
00:29:12.166 --> 00:29:13.833
<i>[ominous music playing]</i>

221
00:29:18.583 --> 00:29:22.166
<i>[narrator] </i>The peanut worm lives in a hole
in the base of the dendro.

222
00:29:26.041 --> 00:29:28.958
<i>The worm keeps its coral landlord upright.</i>

223
00:29:30.666 --> 00:29:33.375
<i>In return, the dendro offers protection</i>

224
00:29:33.458 --> 00:29:36.833
<i>as its slippery tenant</i>
<i>scours the sand for food,</i>

225
00:29:37.500 --> 00:29:40.291
<i>towing its coral caravan along</i>
<i>for the ride.</i>

226
00:29:46.583 --> 00:29:50.916
<i>There are no small roles here,</i>
<i>only small organisms.</i>

227
00:30:03.041 --> 00:30:06.750
<i>The journey across the sand flats</i>
<i>may not be a great distance,</i>

228
00:30:07.333 --> 00:30:10.291
<i>but for a baby fish, it's an odyssey.</i>

229
00:30:15.750 --> 00:30:20.041
<i>Out here, there's nowhere to hide</i>
<i>and not much to eat.</i>

230
00:30:26.791 --> 00:30:30.000
<i>Just when it seems like the sand</i>
<i>might go on forever,</i>

231
00:30:30.083 --> 00:30:32.666
<i>an oasis appears on the horizon.</i>

232
00:30:36.916 --> 00:30:39.916
<i>A labyrinth of mangrove roots,</i>

233
00:30:40.000 --> 00:30:44.083
<i>pockets and passageways with plenty to eat</i>
<i>and fewer ways to be eaten.</i>

234
00:30:44.166 --> 00:30:45.875
<i>[ethereal music playing]</i>

235
00:30:51.333 --> 00:30:54.666
<i>[narrator] </i>The ideal place
for a thumbnail-sized fish to feed,

236
00:30:54.750 --> 00:30:57.750
<i>grow, and perfect the skills</i>
<i>he'll need to survive.</i>

237
00:31:20.583 --> 00:31:23.750
<i>He's not the only one</i>
<i>to have made this pilgrimage.</i>

238
00:31:24.250 --> 00:31:28.000
<i>The shallows are a haven</i>
<i>for all kinds of baby reef fish.</i>

239
00:31:53.416 --> 00:31:55.625
<i>Puff has found his fish nursery.</i>

240
00:31:58.583 --> 00:31:59.916
<i>Things are looking up.</i>

241
00:32:16.000 --> 00:32:18.583
<i>It's been days since his last proper meal.</i>

242
00:32:19.708 --> 00:32:21.833
<i>He's so hungry he could eat a horse.</i>

243
00:32:24.875 --> 00:32:25.750
<i>Or maybe not.</i>

244
00:32:26.250 --> 00:32:29.291
<i>But he does need to find food, and fast.</i>

245
00:32:30.041 --> 00:32:32.541
<i>Watching how the locals do it</i>
<i>could help him.</i>

246
00:32:32.625 --> 00:32:34.250
<i>[whimsical music playing]</i>

247
00:32:50.875 --> 00:32:55.125
<i>[narrator] </i>Pinky-sized seahorses
are expert hunters in this tiny world.

248
00:32:56.000 --> 00:32:59.500
<i>They target crustaceans</i>
<i>smaller than a grain of rice.</i>

249
00:33:01.958 --> 00:33:05.166
<i>These tiny grazers</i>
<i>spend their time munching on algae</i>

250
00:33:05.250 --> 00:33:07.833
<i>and microscopic animals in the seagrass.</i>

251
00:33:08.958 --> 00:33:11.791
<i>They play an essential role</i>
<i>in the food web here.</i>

252
00:33:12.708 --> 00:33:16.875
<i>A link between the plants</i>
<i>and larger creatures like Puff.</i>

253
00:33:18.708 --> 00:33:20.333
<i>[celestial music playing]</i>

254
00:33:32.333 --> 00:33:33.958
<i>[suspenseful music playing]</i>

255
00:33:51.666 --> 00:33:53.333
<i>[soft music playing]</i>

256
00:34:13.416 --> 00:34:14.708
<i>[munching]</i>

257
00:34:21.875 --> 00:34:23.875
<i>[narrator] </i>In the meadows of the lagoon,

258
00:34:23.958 --> 00:34:27.291
<i>algae and seagrasses</i>
<i>harvest energy from the sun.</i>

259
00:34:34.583 --> 00:34:36.666
<i>Supplying food for the community</i>

260
00:34:36.750 --> 00:34:39.958
<i>as well as producing oxygen</i>
<i>for the rest of the planet.</i>

261
00:34:41.375 --> 00:34:43.958
<i>It's a big job for these tiny plants.</i>

262
00:34:58.583 --> 00:35:01.583
<i>Seagrass flowers</i>
<i>are smaller than dandelions.</i>

263
00:35:09.750 --> 00:35:12.708
<i>And they attract swarms</i>
<i>of the tiny crustaceans</i>

264
00:35:12.791 --> 00:35:15.708
<i>that Puff and the seahorses love to eat.</i>

265
00:35:17.250 --> 00:35:21.833
<i>Like these, the crustaceans</i>
<i>can carry pollen from flower to flower.</i>

266
00:35:23.583 --> 00:35:24.916
<i>[celestial music playing]</i>

267
00:35:43.083 --> 00:35:46.083
<i>[narrator] </i>The lagoon is a cosmos
of worlds within worlds.

268
00:35:47.416 --> 00:35:50.000
<i>The closer you look, the more you find.</i>

269
00:36:09.166 --> 00:36:10.791
<i>On a blade of seagrass,</i>

270
00:36:11.291 --> 00:36:16.375
<i>a microscopic entoproct</i>
<i>rolls the contents of its tiny stomach.</i>

271
00:36:19.208 --> 00:36:21.666
<i>Very little is known about this world.</i>

272
00:36:22.208 --> 00:36:23.708
<i>It's just too small.</i>

273
00:36:27.708 --> 00:36:29.250
<i>[mellow music playing]</i>

274
00:37:19.166 --> 00:37:20.083
<i>[chewing]</i>

275
00:37:22.708 --> 00:37:25.041
<i>[narrator] </i>After six months
in the shallows,

276
00:37:25.125 --> 00:37:27.125
<i>Puff is now an adolescent.</i>

277
00:37:28.125 --> 00:37:29.875
<i>And he's eating like one.</i>

278
00:37:30.541 --> 00:37:31.916
<i>[whimsical music playing]</i>

279
00:37:39.875 --> 00:37:41.708
<i>[narrator] </i>He's quadrupled in size.

280
00:37:43.375 --> 00:37:45.166
<i>And his confidence is growing.</i>

281
00:38:04.000 --> 00:38:06.166
<i>But he can't let his guard down.</i>

282
00:38:06.250 --> 00:38:10.250
<i>Even this idyllic nursery</i>
<i>has ambush predators.</i>

283
00:38:18.541 --> 00:38:21.875
<i>This scorpion fish</i>
<i>is perfectly camouflaged,</i>

284
00:38:21.958 --> 00:38:24.916
<i>waiting for unsuspecting victims</i>
<i>to cruise by.</i>

285
00:38:26.708 --> 00:38:28.291
<i>[sinister music playing]</i>

286
00:38:53.791 --> 00:38:57.000
<i>[narrator] </i>But sometimes,
the camouflage can backfire.

287
00:39:20.333 --> 00:39:23.041
<i>The lagoon is a network of relationships.</i>

288
00:39:24.041 --> 00:39:27.000
<i>Everywhere you look,</i>
<i>tiny stories are unfolding.</i>

289
00:39:33.500 --> 00:39:35.291
<i>[celestial music playing]</i>

290
00:39:46.666 --> 00:39:50.833
<i>[narrator] </i>This guard crab doesn't like
baby fish taking bites out of his home.

291
00:39:54.375 --> 00:39:58.375
<i>And he's not gonna put up with any trouble</i>
<i>from a grape-sized butterfly fish.</i>

292
00:39:59.333 --> 00:40:00.666
<i>[ominous music playing]</i>

293
00:40:11.333 --> 00:40:13.500
<i>[narrator] </i>Just when he thought
his work was done,

294
00:40:14.083 --> 00:40:16.250
<i>a hermit decides to trample his polyps.</i>

295
00:40:19.541 --> 00:40:21.958
<i>And clearly, that's not okay.</i>

296
00:40:23.625 --> 00:40:25.166
<i>[dramatic music playing]</i>

297
00:40:32.416 --> 00:40:33.416
<i>[thuds]</i>

298
00:40:41.500 --> 00:40:42.666
<i>[thuds]</i>

299
00:40:50.458 --> 00:40:53.833
<i>[narrator] </i>A crab might look tough
when he's dispatching intruders,

300
00:40:53.916 --> 00:40:58.291
<i>but without his coral refuge,</i>
<i>he, too, could end up as someone's dinner.</i>

301
00:41:01.458 --> 00:41:05.125
<i>The crab needs its coral</i>
<i>as much as the coral needs its crab.</i>

302
00:41:08.875 --> 00:41:12.083
<i>Every creature is dependent on others</i>
<i>for its survival.</i>

303
00:41:14.708 --> 00:41:16.083
<i>[soft music playing]</i>

304
00:41:29.000 --> 00:41:32.416
<i>[narrator] </i>Little Puff has grown
to the size of a human thumb.

305
00:41:32.916 --> 00:41:38.166
<i>Just over two inches long,</i>
<i>and he's finally outgrown this nursery.</i>

306
00:41:40.875 --> 00:41:45.708
<i>Now that he's bigger, the abundant food</i>
<i>back at the reef seems more attractive.</i>

307
00:41:48.875 --> 00:41:51.416
<i>He'll have to cross the sand flats again.</i>

308
00:41:51.500 --> 00:41:54.208
<i>But this time,</i>
<i>Puff sets out as a young adult</i>

309
00:41:54.291 --> 00:41:56.333
<i>in search of his forever home.</i>

310
00:42:05.416 --> 00:42:07.416
<i>[unsettling music plays]</i>

311
00:42:21.541 --> 00:42:23.000
<i>[narrator] </i>Early into the crossing,

312
00:42:23.083 --> 00:42:27.583
<i>Puff comes across a blind zombie snail</i>
<i>sniffing out its next meal.</i>

313
00:42:36.875 --> 00:42:40.166
<i>Tiny scavengers like him</i>
<i>are the ocean's clean-up crew.</i>

314
00:42:41.000 --> 00:42:43.708
<i>It's a dirty job,</i>
<i>but someone's got to do it.</i>

315
00:43:06.916 --> 00:43:10.541
<i>Nearby, a predatory cone snail</i>
<i>is on the hunt.</i>

316
00:43:14.500 --> 00:43:17.875
<i>And he catches the scent</i>
<i>of a zombie snail on the current.</i>

317
00:43:17.958 --> 00:43:19.708
<i>[suspenseful music playing]</i>

318
00:43:22.500 --> 00:43:24.375
<i>[narrator] </i>A low-speed chase begins.

319
00:43:33.458 --> 00:43:36.541
<i>Like a lion hunting a gazelle</i>
<i>on the African plains,</i>

320
00:43:36.625 --> 00:43:38.166
<i>the action is thrilling.</i>

321
00:43:40.250 --> 00:43:44.000
<i>Not really, but it's pretty exciting</i>
<i>when you speed it up.</i>

322
00:43:52.083 --> 00:43:53.708
<i>Out here, you can run,</i>

323
00:43:55.833 --> 00:43:57.083
<i>but you can't hide.</i>

324
00:43:59.041 --> 00:44:02.083
<i>Not from a cone snail's</i>
<i>highly-developed sense of smell.</i>

325
00:44:12.708 --> 00:44:14.708
<i>[suspenseful music intensifies]</i>

326
00:44:20.541 --> 00:44:22.541
<i>[suspenseful music calms down]</i>

327
00:44:32.291 --> 00:44:34.291
<i>[suspenseful music rushes]</i>

328
00:44:50.083 --> 00:44:51.083
<i>[hissing]</i>

329
00:44:52.583 --> 00:44:56.166
<i>[narrator] </i>The cone snail dispatches
the zombie with a venomous harpoon.

330
00:44:58.666 --> 00:44:59.666
<i>Ruthless.</i>

331
00:45:00.416 --> 00:45:01.916
<i>[ethereal music playing]</i>

332
00:45:12.375 --> 00:45:14.375
<i>[narrator] </i>It's a snail-eat-snail world,

333
00:45:15.375 --> 00:45:19.375
<i>but Puff is learning to take</i>
<i>all the murder and mayhem in his stride.</i>

334
00:45:20.500 --> 00:45:23.625
<i>And right now, he's more concerned</i>
<i>with grabbing fast food</i>

335
00:45:23.708 --> 00:45:25.708
<i>on the long journey back to the reef.</i>

336
00:45:29.541 --> 00:45:31.375
<i>[fluttering]</i>

337
00:45:50.583 --> 00:45:55.208
<i>[narrator] </i>As Puff approaches the reef,
he finds a changed world.

338
00:45:58.625 --> 00:46:02.041
<i>Strange colors signal</i>
<i>that the corals are suffering.</i>

339
00:46:13.291 --> 00:46:16.666
<i>The water temperature</i>
<i>is well above their comfort zone.</i>

340
00:46:18.041 --> 00:46:19.541
<i>[dramatic music playing]</i>

341
00:46:30.208 --> 00:46:33.708
<i>[narrator] </i>Within the corals,
the zooxanthellae are stressed,

342
00:46:34.208 --> 00:46:36.333
<i>and the corals start to expel them.</i>

343
00:46:38.750 --> 00:46:41.666
<i>Without their little life partners</i>
<i>supplying food,</i>

344
00:46:42.416 --> 00:46:45.291
<i>they begin to bleach and starve.</i>

345
00:46:45.375 --> 00:46:46.875
<i>[ominous music playing]</i>

346
00:46:48.875 --> 00:46:50.666
<i>[narrator] </i>The corals are dying.

347
00:47:16.250 --> 00:47:17.500
<i>[fluttering]</i>

348
00:47:24.041 --> 00:47:25.916
<i>[somber music playing]</i>

349
00:47:41.000 --> 00:47:46.166
<i>[narrator] </i>Puff's underwater metropolis,
constructed over thousands of years,

350
00:47:46.833 --> 00:47:49.375
<i>is reduced to rubble by a warming ocean.</i>

351
00:47:59.000 --> 00:48:03.541
<i>Many of our planet's coral reefs</i>
<i>are already in this catastrophic state.</i>

352
00:48:04.833 --> 00:48:07.750
<i>Every year, the collapse continues.</i>

353
00:48:10.708 --> 00:48:13.916
<i>Unless we change</i>
<i>the way we do things in our world,</i>

354
00:48:14.541 --> 00:48:17.208
<i>Puff's world will cease to exist.</i>

355
00:48:42.750 --> 00:48:45.458
<i>This was supposed to be</i>
<i>journey's end for Puff,</i>

356
00:48:46.333 --> 00:48:47.708
<i>but he can't stay here.</i>

357
00:48:48.875 --> 00:48:52.208
<i>He'll have to move on</i>
<i>in search of a healthy reef to call home.</i>

358
00:49:04.333 --> 00:49:05.916
<i>[soft piano playing]</i>

359
00:49:23.833 --> 00:49:25.708
<i>[narrator] </i>At around two years of age,

360
00:49:25.791 --> 00:49:29.916
<i>Puff is now ten times longer</i>
<i>than when he first arrived on the reef.</i>

361
00:49:30.541 --> 00:49:32.916
<i>About the size of the palm of your hand.</i>

362
00:49:35.291 --> 00:49:37.000
<i>It's that time of year again,</i>

363
00:49:37.083 --> 00:49:40.208
<i>when the cycles of the moon</i>
<i>and the temperature of the water</i>

364
00:49:40.291 --> 00:49:43.208
<i>trigger the reproductive systems</i>
<i>of billions of corals</i>

365
00:49:43.291 --> 00:49:46.083
<i>on Australia's Great Barrier Reef.</i>

366
00:50:04.208 --> 00:50:05.750
<i>[vibrant music playing]</i>

367
00:50:43.833 --> 00:50:48.708
<i>[narrator] </i>What starts as a trickle
soon floods the sea with hope.

368
00:50:48.791 --> 00:50:50.208
<i>[dramatic music playing]</i>

369
00:50:57.458 --> 00:51:00.458
<i>[narrator] </i>A new generation
sets off to repair,

370
00:51:00.541 --> 00:51:03.500
<i>restore, and create new coral reefs.</i>

371
00:51:12.333 --> 00:51:17.166
<i>On the same night, thousands of other</i>
<i>reef creatures join the mass spawning.</i>

372
00:51:19.791 --> 00:51:23.583
<i>It's the biggest reproductive event</i>
<i>on Earth.</i>

373
00:51:35.708 --> 00:51:40.833
<i>With a little luck, some of these</i>
<i>microscopic heroes will drift to a place</i>

374
00:51:40.916 --> 00:51:42.458
<i>where the fish are healthy,</i>

375
00:51:43.250 --> 00:51:44.708
<i>the water is clean,</i>

376
00:51:45.291 --> 00:51:47.666
<i>and the temperature is just right.</i>

377
00:51:56.291 --> 00:51:59.875
<i>If they do, they may,</i>
<i>against incredible odds,</i>

378
00:51:59.958 --> 00:52:01.916
<i>complete their vital mission…</i>

379
00:52:04.083 --> 00:52:09.041
<i>to build and maintain</i>
<i>the largest living structure on Earth.</i>

380
00:52:25.666 --> 00:52:30.291
<i>Puff has finally found his happy place,</i>
<i>a healthy coral reef.</i>

381
00:52:30.375 --> 00:52:32.041
<i>[uplifting music playing]</i>

382
00:53:19.125 --> 00:53:21.625
<i>[narrator] </i>Now that he's bigger
and more confident,

383
00:53:21.708 --> 00:53:25.083
<i>old enemies that once bullied him</i>
<i>steer clear.</i>

384
00:53:26.666 --> 00:53:28.250
<i>[ominous music playing]</i>

385
00:53:57.208 --> 00:53:59.541
<i>[narrator] </i>Yeah, keep swimming, lionfish.

386
00:54:00.166 --> 00:54:01.833
<i>Just keep swimming.</i>

387
00:54:06.833 --> 00:54:09.958
<i>All grown up,</i>
<i>Puff will soon find a territory,</i>

388
00:54:10.041 --> 00:54:13.000
<i>an area he will get to know</i>
<i>like the back of his fin.</i>

389
00:54:13.500 --> 00:54:16.166
<i>And he'll defend it</i>
<i>from other male pufferfish,</i>

390
00:54:16.250 --> 00:54:18.708
<i>in the hope that someday</i>
<i>he might find a mate.</i>

391
00:54:18.791 --> 00:54:20.291
<i>[ethereal music playing]</i>

392
00:54:36.666 --> 00:54:38.250
<i>[soft music playing]</i>

393
00:55:06.250 --> 00:55:09.000
<i>[narrator] </i>Puff and his mate
could live for almost a decade.

394
00:55:11.708 --> 00:55:14.541
<i>One day, their young</i>
<i>will be cast into the ocean</i>

395
00:55:14.625 --> 00:55:17.875
<i>to play a vital role</i>
<i>in this wonderful ecosystem.</i>

396
00:55:22.041 --> 00:55:24.166
<i>And they'll have some big shoes to fill.</i>

397
00:55:27.833 --> 00:55:30.875
<i>Our window to this micro world</i>
<i>has only just opened.</i>

398
00:55:31.958 --> 00:55:34.458
<i>Its tiny creatures</i>
<i>are revealing themselves</i>

399
00:55:34.541 --> 00:55:37.958
<i>to be intelligent and complex</i>
<i>beyond our imagining.</i>

400
00:55:40.041 --> 00:55:42.916
<i>There are still places to swim</i>
<i>with sharpnose pufferfish,</i>

401
00:55:43.000 --> 00:55:46.375
<i>camouflaged monsters, and colorful corals.</i>

402
00:55:49.875 --> 00:55:52.666
<i>These extraordinary little beings</i>
<i>are doing all they can</i>

403
00:55:52.750 --> 00:55:54.666
<i>to maintain their fragile world.</i>

404
00:55:57.333 --> 00:56:00.500
<i>The rest is up to us.</i>

405
00:56:09.500 --> 00:56:11.500
<i>["Let Yourself Be Free" playing]</i>

406
00:56:19.875 --> 00:56:21.500
<i>♪</i> What do you feel ♪

407
00:56:24.791 --> 00:56:26.791
<i>♪ I gotta know ♪</i>

408
00:56:27.875 --> 00:56:29.416
<i>♪ I gotta know ♪</i>

409
00:56:29.500 --> 00:56:31.833
<i>♪ Whatever it is ♪</i>

410
00:56:34.500 --> 00:56:36.625
<i>♪ You should let it go ♪</i>

411
00:56:36.708 --> 00:56:38.208
<i>♪ Let it go ♪</i>

412
00:56:38.833 --> 00:56:41.250
<i>♪ Dance when you wanna dance ♪</i>

413
00:56:41.333 --> 00:56:43.291
<i>♪ Sing when you wanna sing ♪</i>

414
00:56:43.791 --> 00:56:45.833
<i>♪ Live how you wanna live ♪</i>

415
00:56:46.416 --> 00:56:48.041
<i>♪ Let yourself be free ♪</i>

416
00:56:48.916 --> 00:56:50.916
<i>♪ Dance when you wanna dance ♪</i>

417
00:56:51.000 --> 00:56:52.958
<i>♪ Sing when you wanna sing ♪</i>

418
00:56:53.833 --> 00:56:55.625
<i>♪ Live how you wanna live ♪</i>

419
00:56:56.125 --> 00:56:57.750
<i>♪ Let yourself be free ♪</i>

420
00:56:59.000 --> 00:57:00.625
<i>♪ Can't nobody ♪</i>

421
00:57:01.500 --> 00:57:03.250
<i>♪ Turn me around ♪</i>

422
00:57:03.750 --> 00:57:05.500
<i>♪ Can't nobody ♪</i>

423
00:57:06.250 --> 00:57:08.541 line:5%
<i>♪ Slow me down ♪</i>

424
00:57:08.625 --> 00:57:12.750 line:5%
<i>♪ I got this feeling way down in my soul ♪</i>

425
00:57:13.833 --> 00:57:17.583
<i>♪ Gotta hold of me</i>
<i>And it just won't let me go ♪</i>

426
00:57:27.875 --> 00:57:29.791
<i>♪ Dance when you wanna dance ♪</i>

427
00:57:29.875 --> 00:57:32.166
<i>♪ Sing when you wanna sing ♪</i>

428
00:57:32.791 --> 00:57:34.750
<i>♪ Live how you wanna live ♪</i>

429
00:57:35.250 --> 00:57:37.250
<i>♪ Let yourself be free ♪</i>

430
00:57:38.208 --> 00:57:40.125
<i>♪ Dance when you wanna dance ♪</i>

431
00:57:40.208 --> 00:57:42.416
<i>♪ Sing when you wanna sing ♪</i>

432
00:57:42.500 --> 00:57:44.208
<i>♪ Live how you wanna live ♪</i>

433
00:57:45.041 --> 00:57:46.916
<i>♪ Let yourself be free ♪</i>

434
00:57:47.458 --> 00:57:49.375
<i>♪ Dance when you wanna dance ♪</i>

435
00:57:49.875 --> 00:57:52.166
<i>♪ Sing when you wanna sing ♪</i>

436
00:57:56.041 --> 00:57:57.625
<i>♪ Let yourself be free ♪</i>