Sharks predate trees by about 90 million years — they've been swimming Earth's oceans for 450 million years.

There is a river in the ocean — the Gulf Stream moves more water than all of Earth's rivers combined.

Fact #3404 · Ocean

The Pacific Ocean covers nearly one-third of Earth's surface.

Fact #297 · Ocean

Sea horses swim upright rather than horizontally.

Fact #446 · Ocean

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

Fact #657 · Ocean

The Pacific Ocean is deeper on average than other oceans.

Fact #226 · Ocean

Bioluminescence is estimated to occur in 76% of all ocean species.

Fact #5102 · Ocean

Marine iguanas in the Galapagos are the only ocean-going lizards in the world.

Fact #5145 · Ocean

The Pacific Ocean contains thousands of islands.

Fact #200 · Ocean