The Mariana Trench is the deepest known part of Earth's oceans.

Deep-sea creatures often have bioluminescent organs for communication.

Fact #884 · Ocean

The deep-sea environment is near freezing in temperature.

Fact #1419 · Ocean

The ocean contains structures larger than mountain ranges.

Fact #2003 · Ocean

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

Fact #5230 · Ocean

Deep-sea pressure at the Mariana Trench is over 1,000 times atmospheric pressure at sea level.

Fact #5128 · Ocean

Coral reefs are expected to decline by 70–90% if global temperatures rise 1.5°C above pre-industrial levels.

Fact #5233 · Ocean

The ocean contains structures larger than mountain ranges.

Fact #1832 · Ocean

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

Fact #220 · Ocean