The ocean floor has more mountains, longer mountain ranges, and deeper trenches than any continent.

Some fish can change color to blend with their surroundings.

Fact #392 · Ocean

Surfer Garrett McNamara rode a 78-foot wave off Nazaré, Portugal, in 2011 — a record at the time.

Fact #4466 · Ocean

Some deep-sea fish like the viperfish have teeth so large they cannot close their mouths.

Fact #5109 · Ocean

Some deep-sea jellyfish emit flashes of light when disturbed.

Fact #1396 · Ocean

The tallest mountain from base to peak is Mauna Kea in Hawaii — it's just mostly underwater.

Fact #3405 · Ocean

Some fish build intricate sand nests.

Fact #436 · Ocean

The Mariana Trench reaches depths of nearly 36,000 feet.

Fact #1388 · Ocean

Trilobites lived in ancient oceans long before dinosaurs.

Fact #692 · Ocean