The Sargasso Sea is the only sea in the world without a land boundary — it is defined by ocean currents.

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

Fact #912 · Ocean

The ocean contains structures larger than mountain ranges.

Fact #2150 · Ocean

Sea horses swim upright rather than horizontally.

Fact #446 · Ocean

Trilobites lived in ancient oceans long before dinosaurs.

Fact #692 · Ocean

Sea turtles have existed for over 100 million years.

Fact #1286 · Ocean

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

Fact #1387 · Ocean

Somewhere between 50% and 80% of earth's living organisms are in the ocean.

Fact #2593 · Ocean

The ocean contains structures larger than mountain ranges.

Fact #1796 · Ocean