The cuttlefish uses countershading — dark on top, light on bottom — to match the ocean's light gradient.

Orcas are members of the dolphin family.

Fact #1244 · Ocean

Octopuses have been observed using tools and solving puzzles.

Fact #2232 · Ocean

A squid can propel itself rapidly by jetting water.

Fact #417 · Ocean

Some dolphins exhibit playful behavior even without reward.

Fact #1324 · Ocean

The Pacific Ocean is deeper on average than other oceans.

Fact #226 · Ocean

The Mariana Trench is the deepest known part of Earth's oceans.

Fact #109 · Ocean

Blue whales are the largest animals known to have ever lived.

Fact #246 · Ocean

Octopuses can escape sealed containers and solve puzzles.

Fact #2561 · Ocean