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 ...

Temperatures are beginning to ease and there are some brave souls who have already gone to enjoy the beach. In California, ...

Since its discovery in 1925, only eight adult specimens have been reported, severely limiting scientists’ ability to research ...

Second only in size to the blue whale, seeing a fin whale surface from the ocean's depths can leave you spellbound!

Tourists on a whale-watching boat off Australia witnessed five families of killer whales attack 150-ton mammal.

The velella have come ashore by the thousands on Central Coast beaches. This is the way the beach in Santa Barbara looked in ...

Two research expeditions have captured the first footage of two squid species — a colossal squid and a glacial glass squid — swimming in the deep sea.

A massive sea creature was finally freed after spending six months confined among lines and buoys from a crab trap, ...

An entire world lives deep under the ocean’s surface, far from human notice and as bustling as any city. Animals such as tubeworms and clams live crowded around plumes of methane that bubble up ...

While this blue sea creature appears to be writhing in pain, it’s actually just moving around. The cerata, or feather-like protrusions from the body, move easily and gracefully.