Dolphins can recognize themselves in mirrors, a sign of self-awareness.

Some volcanoes can erupt underwater without anyone noticing.

Fact #2248 · Ocean

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

Fact #3913 · Ocean

The mimic octopus can impersonate over 15 different marine species.

Fact #3240 · Ocean

Some deep-sea creatures produce their own light through bioluminescence.

Fact #1391 · Ocean

Some whales communicate across vast distances underwater.

Fact #228 · Ocean

Some species of octopus can change both color and texture.

Fact #343 · Ocean

The largest animal ever known to exist is the blue whale.

Fact #914 · Ocean

Only about 5% of the ocean has been explored by humans.

Fact #2776 · Ocean