The Pacific Ocean contains thousands of islands.

The world's deepest postbox is in Susami Bay, Japan — it sits 10 meters underwater and receives waterproofed mail.

Fact #3976 · Ocean

A sea lion can dive hundreds of feet underwater.

Fact #482 · Ocean

More than half of the world's coral reefs have been lost since the 1950s due to warming and acidifying oceans.

Fact #4292 · Ocean

The Pacific Ocean has the most islands of any ocean.

Fact #327 · Ocean

The ocean contains structures larger than mountain ranges.

Fact #2150 · Ocean

Sea cucumbers can expel internal organs as a defense mechanism.

Fact #350 · Ocean

There is a river in the ocean — the Gulf Stream moves more water than all of Earth's rivers combined.

Fact #3404 · Ocean

Deep-sea environments have crushing pressures far greater than at sea level.

Fact #1394 · Ocean