The ocean is a vast and mysterious place. Click through the gallery above to learn 15 mind-blowing facts about the ocean, the largest biome on planet Earth, and its unique ecosystems.

The giant ocean called Panthalassa surrounded Pangaea ... The oceans teemed with the coiled-shelled ammonites, mollusks, and sea urchins that survived the Permian extinction and were quickly ...

“It’s finally happened!” Those are all comments dropped by the researchers as the marine mollusk appeared on camera. The footage gives scientists and ocean fans a rare glimpse at an elusive ...