About 71% of Earth's surface is covered by water, but 97.5% of that is saltwater.

The lifetime odds of dying from drowning are about 1 in 1,000.

Fact #3021 · Ocean

Ancient oceans once covered much of Earth's surface.

Fact #705 · Ocean

A sea anemone uses stinging cells to capture prey.

Fact #437 · Ocean

The ocean contains structures larger than mountain ranges.

Fact #2105 · Ocean

More than half of the world's coral reefs have been lost since the 1950s due to warming and acidifying oceans.

Fact #4292 · Ocean

Some deep‑sea fish create their own light.

Fact #2475 · Ocean

Phytoplankton populations have declined by about 40% since 1950, threatening the marine food chain.

Fact #5230 · Ocean

The deepest ocean trench is the Mariana Trench.

Fact #907 · Ocean