Deep-sea creatures often have bioluminescent organs for communication.

Some whales sing songs that travel hundreds of miles underwater.

Fact #381 · Ocean

The ocean is, on average, 3,682 meters deep — the deepest point is about 11,000 meters.

Fact #5116 · Ocean

Some prehistoric marine reptiles hunted in ancient oceans.

Fact #686 · Ocean

A sea star moves using tiny tube feet.

Fact #498 · Ocean

Some deep‑sea creatures have never seen sunlight in millions of years.

Fact #2237 · Ocean

Ancient oceans once covered much of Earth's surface.

Fact #705 · Ocean

Some deep‑sea fish create their own light.

Fact #2475 · Ocean

Coral reefs are expected to decline by 70–90% if global temperatures rise 1.5°C above pre-industrial levels.

Fact #5233 · Ocean