Antarctica has active volcanoes — Mount Erebus is the southernmost active volcano in the world.

The Pacific Ocean is deeper on average than other oceans.

Fact #226 · Ocean

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

Fact #3404 · Ocean

A sea star moves using tiny tube feet.

Fact #498 · Ocean

The ocean contains structures larger than mountain ranges.

Fact #2074 · Ocean

The Great Barrier Reef is the largest coral reef system in the world.

Fact #13 · Ocean

Prehistoric coral reefs were similar to modern reefs.

Fact #707 · Ocean

Water covers more than 70% of Earth's surface.

Fact #86 · Ocean

The Great Barrier Reef supports thousands of marine species.

Fact #186 · Ocean