A riotous photography collection from a recent underwater mission off the coast of Chile shows new and fascinating deep-sea ...

The jellyfishlike creatures, called Velella velella, emerged Sunday along Bolinas Beach in Marin County, a visitor told the ...

Naturalist Stan Tekiela explores the enduring charm, biology, and resilience of sea otters during a recent photo tour in ...

In recent weeks, hundreds of sea lions, dolphins and other animals have turned up in the sand dead or seriously ill, alarming ...

Banner image of a southern sea otter feeding on sea animal. Photo courtesy of Chris Law. Liz Kimbrough is a staff writer for Mongabay and holds a Ph.D. in ecology and evolutionary biology from ...

Domoic acid poisoning is stranding marine mammals as warnings are issued to beachgoers of the threat posed by animals that ...

Look, here comes a blobfish! This thrilling deep-sea fish was voted the world's ugliest animal by the Ugly Animal Preservation Society. But its jelly-like skin looks much more natural at 900 meters.

The pregnant sea lion was alone on a rocky shoreline in Imperial Beach. Suffering from a suspected case of domoic acid poisoning, the animal cycled through troubling movements: first, her head would ...

Sea dragons survive on tiny crustaceans such as mysids, or sea lice. It is not known if they are preyed upon by other animals. They are, however, frequently taken by divers seeking to keep them as ...

The two most prominent types of plankton in the ocean are zooplankton, which are tiny animal organisms, and phytoplankton, which are plantlike. (Other forms of plankton include bacterial and fungal.