Hydrothermal vents support unique ecosystems without sunlight.

The Great Barrier Reef has experienced multiple mass bleaching events since 1998 as sea temperatures rise.

Fact #5201 · Ocean

The deep ocean remains largely unexplored by humans.

Fact #1416 · Ocean

The ocean contains structures larger than mountain ranges.

Fact #2036 · Ocean

More than 70% of Earth's oxygen is produced by marine plants, primarily phytoplankton.

Fact #3399 · Ocean

The whale shark is the world's largest fish, growing up to 12 meters and filtering tons of water daily.

Fact #4541 · Ocean

The mimic octopus can imitate other sea creatures.

Fact #355 · Ocean

Tsunamis can travel across entire ocean basins.

Fact #830 · Ocean

The ocean covers more than 70 percent of Earth's surface.

Fact #657 · Ocean