Dolphins have been observed using sponges as tools to protect their snouts while foraging on the seafloor.

The deep ocean is the largest habitat on Earth.

Fact #1405 · Ocean

The U.S. once detonated nuclear weapons underwater near its own ships for testing.

Fact #2758 · Ocean

Some deserts were once oceans.

Fact #2661 · Ocean

Octopuses have been observed escaping aquariums, navigating floors, and entering other tanks to hunt for food.

Fact #2335 · Ocean

Some whales sing songs that travel hundreds of miles underwater.

Fact #381 · Ocean

The Ring of Fire surrounds much of the Pacific Ocean.

Fact #814 · Ocean

Male seahorses carry and give birth to the young — the only male animal known to experience true pregnancy.

Fact #3527 · Ocean

Dolphins have names for each other — they use unique whistles to address individuals.

Fact #3234 · Ocean