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Fish vs Bird | 4K UHD | Blue Planet II | BBC Earth
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A kilometer from the surface
beyond the reach of the sun,
a giant black void larger
than all the rest of the world's
habitats combined.
There's life here,
but not as we know it.
Alien like creatures
produce dazzling displays of light.
Nearly all animals need to attract
mates and repel predators.
This language of light
is so widespread here that these signals
are probably the commonest form
of communication
on the entire planet,
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