Some octopuses carry coconut shells for portable shelter — the first documented use of tools by an invertebrate.

Some deep-sea jellyfish emit flashes of light when disturbed.

Fact #1396 · Ocean

Public health sanitation reforms reduced disease outbreaks.

Fact #1210 · Ocean

Deep-sea creatures often grow slowly due to limited food availability.

Fact #1400 · Ocean

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

Fact #1422 · Ocean

The Pacific Ocean contains numerous coral atolls.

Fact #315 · Ocean

Dolphins call each other by unique names.

Fact #2569 · Ocean

The Nile Delta is sinking — it's being weighed down by sediment and eroded by rising seas.

Fact #3913 · Ocean

Some volcanoes can erupt underwater.

Fact #2624 · Ocean