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

Sea otters use rocks as tools to break open shellfish.

Fact #43 · Ocean

The Earth's crust is thinner beneath oceans.

Fact #127 · Ocean

The Earth's oceans are interconnected.

Fact #314 · Ocean

Certain dolphins cooperate to herd fish in coordinated groups.

Fact #1301 · Ocean

Some volcanoes can erupt underwater.

Fact #2624 · Ocean

A whale shark is the largest fish in the ocean.

Fact #462 · Ocean

There are deep ocean creatures that glow.

Fact #2292 · Ocean

Some deep‑sea fish create their own light.

Fact #2475 · Ocean