Dolphins produce signature whistles by the time they're a year old — unique 'names' they use for life.

Humpback whales sing songs that evolve over time — males across an ocean basin gradually adopt the same new melody.

Fact #3859 · Ocean

Some prehistoric marine reptiles hunted in ancient oceans.

Fact #686 · Ocean

The deep-sea environment is near freezing in temperature.

Fact #1419 · Ocean

A sea turtle can navigate back to its birthplace decades later.

Fact #575 · Ocean

Sea otters wrap themselves in kelp to stay anchored while sleeping.

Fact #1267 · Ocean

Sea horses swim upright rather than horizontally.

Fact #446 · Ocean

There are more atoms in a glass of water than glasses of water in Earth's oceans.

Fact #2617 · Ocean

Blue whales are the largest animals known to have ever lived.

Fact #246 · Ocean