The Mariana Trench was first described in detail after HMS Challenger's survey voyage of 1872–1876.

The original name for the search engine Google was 'BackRub.'

Fact #3956 · Ocean

Some volcanoes can erupt underwater.

Fact #2624 · Ocean

The Earth's crust is thinner beneath oceans.

Fact #264 · Ocean

Dolphins call each other by unique names.

Fact #2569 · Ocean

Deep-sea fish often have flexible bodies to withstand high pressure.

Fact #864 · Ocean

The immortal jellyfish can revert back to its juvenile state after reaching maturity, theoretically living forever.

Fact #3517 · Ocean

Some deep-sea jellyfish emit flashes of light when disturbed.

Fact #1396 · Ocean

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

Fact #3404 · Ocean