Sea otters wrap themselves in kelp to stay anchored while sleeping.

The Cambrian period introduced many early marine animals.

Fact #746 · Ocean

Octopuses have been observed using tools and solving puzzles.

Fact #2232 · Ocean

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

Fact #1387 · Ocean

The Earth's crust is thinner beneath oceans.

Fact #127 · Ocean

The Earth's poles experience extreme seasonal variations in sunlight.

Fact #207 · Ocean

Sea cucumbers can expel internal organs as a defense mechanism.

Fact #350 · Ocean

The Ring of Fire surrounds much of the Pacific Ocean.

Fact #814 · Ocean

Dolphins call each other by unique names.

Fact #2569 · Ocean