Scientists discover underwater mountain ranges, golden towers of coral, and never-before-seen sea creatures.

Deep beneath the ocean’s surface, there are creatures so bizarre and terrifying that even the sea seems to hide them. From alien-like predators to deep-sea monsters no human has ever seen alive, these ...

Hordes of bright blue, jellyfish-like sea creatures are washing up on beaches across California. As of Monday, thousands of the critters — called velella velella or by-the-wind sailors — have been ...