The ocean emits about 25% of the sound heard by underwater creatures.

Some whales communicate across vast distances underwater.

Fact #228 · Ocean

The Mariana Trench is so deep that Mount Everest could be submerged in it with over a mile to spare.

Fact #4253 · Ocean

The Arctic Ocean is the smallest ocean.

Fact #141 · Ocean

Ancient oceans once covered much of Earth's surface.

Fact #705 · Ocean

The Pacific Ocean has the most islands of any ocean.

Fact #327 · Ocean

Some species of nudibranch (sea slug) incorporate stinging cells from jellyfish into their own bodies for defense.

Fact #5126 · Ocean

Greenland's ice sheet is melting at accelerating rates, contributing significantly to global sea-level rise.

Fact #4779 · Ocean

The Pacific Ocean is home to the Mariana Trench.

Fact #276 · Ocean