Meet the creatures.

Otters hold hands while sleeping so they don't drift apart.

A giraffe has the same number of neck bones as a human — just seven.

Gorillas share about 98% of their DNA with humans.

Axolotls can regrow entire limbs — and even parts of their brain.

Its punch accelerates as fast as a .22 bullet.

Tiny but mighty — its rings glow as a warning to stay away.

Blue tangs can change the shade of their color to communicate.

Each eye moves on its own, giving a near 360° field of view.

Goldens were bred to carry game gently — without leaving a mark.

Sea turtles have been around for over 100 million years.

Herons stand perfectly still for minutes before striking.

The world's most trafficked mammal — and utterly harmless.

One of the only mammals that lays eggs — and senses electricity.

Their dazzling colors warn predators: do not touch.

The bigger the nose, the louder the call.

A rhino's horn is made of keratin — the same as your hair.

Sloths are so slow that algae grows on their fur.

Walruses use their tusks to haul their huge bodies onto ice.