Learn why blue whale calves are prime orca targets and how their massive mothers use slipstreams, allies, and shockwaves to keep them alive.

The chain catshark may look like any other shark in daylight, but under blue light, its skin glows neon green. Here’s a breakdown of this remarkable adaptation.

Source: Andii Kneebone A disturbing discovery off an island in the country’s south has left locals baffled, with a series of photos revealing dozens of dead animals mysteriously floating in the sea.

Explore seven jelly creatures found off the Oregon coast, from Velella velella and moon jellies to giant lion’s mane, with graphics showing size, stings and other key facts.

Some of the smallest marine species are actually the most important because all other life depends on them. Phytoplankton are probably the most important, but just above them in the food chain are ...

Sharks might not be a natural biological group, with most species potentially closer kin to rays than to an oddball group of sharks.

Right whales can also be difficult to spot from boats due to their dark-colored skin and lack of a dorsal fin.

Two ‘doomsday’ fish have gone viral after washing up on a beach in Cabo, Mexico, and the internet has been incredibly ...

Many ocean creatures appear soft and harmless, drifting gently through the water. But some of them carry one of the ocean’s most unusual weapons. Cnidarians — the group that includes jellyfish, corals ...

A massive adult female Kemp’s ridley sea turtle washed ashore near Beach Pocket Park #3 in Galveston on March 7, triggering an urgent rescue effort along the Texas Gulf Coast. The turtle — the world’s ...

Many insects live in fresh water, or close to the sea in salt marsh and beach habitats. There are also several species of water striders in the genus Halobates, which live on the ocean’s surface, far ...