The largest animal to ever live on Earth is the blue whale — still alive today.

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

Fact #564 · Ocean

A newborn blue whale gains about 200 pounds per day in its first year.

Fact #3662 · Ocean

Deep-sea creatures often have bioluminescent organs for communication.

Fact #884 · Ocean

Octopuses can solve simple puzzles and open jars.

Fact #31 · Ocean

Whales are mammals and must breathe air.

Fact #265 · Ocean

The Pacific Ocean borders more countries than any other ocean.

Fact #238 · Ocean

The deep ocean floor is covered with fine sediment known as ooze.

Fact #1422 · Ocean

Bioluminescence is common among deep-sea organisms.

Fact #1418 · Ocean