The deepest manned dive ever reached the Mariana Trench floor — first visited by Piccard and Walsh in 1960.

Some bacteria can survive in extreme environments such as deep-sea vents.

Fact #257 · Ocean

The Dead Sea lies at one of the lowest elevations on land.

Fact #50 · Ocean

Octopuses can solve simple puzzles and open jars.

Fact #31 · Ocean

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

Fact #3404 · Ocean

A sea horse anchors itself using its tail.

Fact #514 · Ocean

Octopuses solve mazes.

Fact #2571 · Ocean

Many deep-sea fish have transparent or nearly invisible bodies.

Fact #1387 · Ocean

Some dolphins exhibit playful behavior even without reward.

Fact #1324 · Ocean