Some of these ocean vagrants may offer protection

Like this pyrosome is doing for the shrimp

In the world's deepest ocean

Averaging over two and a half miles deep

New species are constantly being discovered

Like this seahorse never filmed before

At dawn

These little-known creatures retreat into the safety of the abyss

But there are some predators that can follow them down

Short-finned pilot whales are accomplished deep-sea divers

Leaving the barren upper layers behind

They can swim over half a mile down

And use their sonar to track the huge shoals of squid

But they too are being tracked

Oceanic whitetip sharks three metres long

And completely at home in the open ocean

They may not be able to dive deep enough

To catch the squid themselves

But that won't stop them hanging around for scraps

Or maybe they're sizing up the calf

This one however is well guarded by the bulls

But in the endless blue

Where the odds of finding a meal are so low

Even the slimmest opportunity is worth a try

Perhaps this is why

The oceanic whitetip is thought to be responsible

For more attacks on shipwrecked sailors than any other shark in the Pacific