A hippopotamus can hold its breath underwater for several minutes.

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

Fact #13 · Ocean

Certain dolphins cooperate to herd fish in coordinated groups.

Fact #1301 · Ocean

Sea horses swim upright rather than horizontally.

Fact #446 · Ocean

The Pacific Ocean is the deepest ocean on Earth.

Fact #337 · Ocean

A giant squid lives in deep ocean waters.

Fact #522 · Ocean

Some volcanoes can erupt underwater without anyone noticing.

Fact #2248 · Ocean

The original name for the search engine Google was 'BackRub.'

Fact #3956 · Ocean

The U.S. once detonated nuclear weapons underwater near its own ships for testing.

Fact #2758 · Ocean