Nitrogen pollution from agriculture creates 'dead zones' in coastal oceans — over 400 globally.

The tripod fish can stand on the ocean floor using elongated fin rays.

Fact #1397 · Ocean

Deep-sea coral reefs exist without sunlight.

Fact #1412 · Ocean

The Earth's oceans contain over 200,000 identified species.

Fact #180 · Ocean

The Portuguese man o' war's tentacles can extend up to 50 meters and remain dangerous even when detached.

Fact #5141 · Ocean

Prehistoric coral reefs were similar to modern reefs.

Fact #707 · Ocean

A giant squid lives in deep ocean waters.

Fact #522 · Ocean

The Dead Sea is shrinking by about one meter per year due to water diversion and evaporation.

Fact #4777 · Ocean

The Earth's oceans absorb large amounts of carbon dioxide.

Fact #242 · Ocean