The barreleye fish has a completely transparent head that allows it to look straight up through its skull.

Some whales communicate across vast distances underwater.

Fact #228 · Ocean

The Great Barrier Reef is home to thousands of marine species.

Fact #76 · Ocean

Operation Ivy Bells involved Cold War submarine intelligence gathering.

Fact #1075 · Ocean

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

Fact #864 · Ocean

A giant squid lives in deep ocean waters.

Fact #522 · Ocean

Octopuses can escape sealed containers and solve puzzles.

Fact #2561 · Ocean

Some dolphins sleep with one half of their brain at a time.

Fact #564 · Ocean

The deep-sea environment is near freezing in temperature.

Fact #1419 · Ocean