The 2004 Indian Ocean tsunami was triggered by a massive undersea earthquake.

The giant amphipod thrives in extreme ocean depths.

Fact #1421 · Ocean

Operation Ivy Bells involved Cold War submarine intelligence gathering.

Fact #1075 · Ocean

Penguins use their flippers to propel themselves underwater.

Fact #1238 · Ocean

Octopuses can escape sealed containers and solve puzzles.

Fact #2561 · Ocean

The Great Barrier Reef is the largest coral reef system in the world.

Fact #13 · Ocean

Steve Irwin died after being pierced by a stingray barb.

Fact #3201 · Ocean

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

Fact #456 · Ocean

Some butterflies migrate seasonally.

Fact #505 · Ocean