Some species of jellyfish are biologically immortal under certain conditions.

Some species of birds form lifelong pair bonds.

Fact #537 · Animals

Some mammals, like bats, use echolocation.

Fact #465 · Animals

Certain fish can survive in oxygen-poor water.

Fact #453 · Animals

Some birds use tools to obtain food.

Fact #294 · Animals

Elephants communicate using low-frequency sounds.

Fact #51 · Animals

Some amphibians can absorb oxygen through their skin.

Fact #328 · Animals

Some species of frogs lay eggs on land instead of in water.

Fact #572 · Animals

The Earth's oceans contain over 200,000 identified species.

Fact #180 · Animals