The world's longest mountain chain is actually underwater — the Mid-Ocean Ridge stretches over 65,000 km.

Rubber ducks accidentally became global ocean research tools when 29,000 of them spilled into the Pacific in 1992.

Fact #5738 · Ocean

The leafy sea dragon is so well camouflaged it was not studied alive until the 1990s.

Fact #5135 · Ocean

The ocean contains structures larger than mountain ranges.

Fact #2152 · Ocean

Only about 5% of the ocean has been explored by humans.

Fact #2776 · Ocean

Certain fish can produce their own light through bioluminescence.

Fact #372 · Ocean

The ocean contains structures larger than mountain ranges.

Fact #2003 · Ocean

The ocean contains structures larger than mountain ranges.

Fact #2212 · Ocean

Some fish build intricate sand nests.

Fact #436 · Ocean