The Caspian Sea is shrinking — it has lost 20% of its surface area due to warming and water diversion.

The ocean contains structures larger than mountain ranges.

Fact #2068 · Ocean

Greenland's ice sheet is melting at accelerating rates, contributing significantly to global sea-level rise.

Fact #4779 · Ocean

Some coral reefs are visible from space.

Fact #197 · Ocean

The Dead Sea is one of the saltiest bodies of water on Earth.

Fact #266 · Ocean

Some fish can change color to blend with their surroundings.

Fact #392 · Ocean

The world's deepest postbox is in Susami Bay, Japan — it sits 10 meters underwater and receives waterproofed mail.

Fact #3976 · Ocean

The Pacific Ocean is larger than all of Earth's continents combined.

Fact #4 · Ocean

The Earth's oceans cover more than 70% of the planet's surface.

Fact #220 · Ocean