Ocean acidification affects shellfish most dramatically — their shells dissolve in more acidic water.

Over 90% of Earth's volcanic activity occurs underwater, along mid-ocean ridges.

Fact #4774 · Ocean

The Dead Sea is so salty that nothing larger than bacteria can survive in it, and swimmers float effortlessly.

Fact #4257 · Ocean

The largest living structure on Earth is the Great Barrier Reef.

Fact #912 · Ocean

The ocean contains structures larger than mountain ranges.

Fact #1796 · Ocean

Some whales sing songs that travel hundreds of miles underwater.

Fact #381 · Ocean

Certain fish clean parasites from larger fish.

Fact #422 · Ocean

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

Fact #4779 · Ocean

Many deep-sea fish have transparent or nearly invisible bodies.

Fact #1387 · Ocean