Dolphins sleep with one eye open — half their brain rests at a time.

Dolphins use teamwork.

Fact #2576 · Ocean

A dolphin’s brain is relatively large compared to its body size.

Fact #456 · Ocean

Jellyfish have existed for hundreds of millions of years.

Fact #117 · Ocean

Certain marine animals use camouflage to blend into coral reefs.

Fact #487 · Ocean

Operation Ivy Bells involved Cold War submarine intelligence gathering.

Fact #1075 · Ocean

Glacial periods caused sea levels to drop significantly.

Fact #748 · Ocean

The Arctic Ocean is the smallest ocean.

Fact #141 · Ocean

Male seahorses carry and give birth to their young.

Fact #359 · Ocean