There is a river in the ocean — the Gulf Stream moves more water than all of Earth's rivers combined.

The ocean contains structures larger than mountain ranges.

Fact #2212 · Ocean

The ocean contains structures larger than mountain ranges.

Fact #2003 · Ocean

Some fish build intricate sand nests.

Fact #436 · Ocean

Lake Malawi contains more species of fish than any other lake in the world.

Fact #4799 · Ocean

Dolphins surf ocean waves purely for fun — one of the clearest signs of play behavior in animals.

Fact #5979 · Ocean

Some deep-sea octopuses brood their eggs for years.

Fact #1413 · Ocean

More than 80% of the world's oceans remain unmapped and unexplored.

Fact #4284 · Ocean

Prehistoric oceans contained giant marine reptiles.

Fact #724 · Ocean