The Caspian Sea is technically the world's largest lake, covering 371,000 square kilometers.

Octopuses can solve simple puzzles and open jars.

Fact #31 · Ocean

The dumbo octopus gets its name from ear-like fins on its mantle.

Fact #1395 · Ocean

Male seahorses carry and give birth to their young.

Fact #359 · Ocean

Penguins have excellent underwater vision.

Fact #1288 · Ocean

Humpback whales sing songs that evolve over time — males across an ocean basin gradually adopt the same new melody.

Fact #3859 · Ocean

The original name for the search engine Google was 'BackRub.'

Fact #3956 · Ocean

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

Fact #1396 · Ocean

The Pacific Ocean is the deepest ocean on Earth.

Fact #337 · Ocean