A sea otter uses its chest as a surface for cracking shells.

There are underwater waterfalls caused by differences in water density.

Fact #2442 · Ocean

The highest recorded ocean wave exceeded 80 feet in height.

Fact #920 · Ocean

Dolphins call each other by unique names.

Fact #2569 · Ocean

The siphonophore can grow to extraordinary lengths in the ocean depths.

Fact #1408 · Ocean

Whales are mammals and must breathe air.

Fact #265 · Ocean

The Pacific Ocean is larger than all the Earth's landmasses combined.

Fact #3394 · Ocean

The deep ocean remains largely unexplored by humans.

Fact #1416 · Ocean

Some dolphins cooperate to herd fish while hunting.

Fact #1273 · Ocean