A renowned marine biologist claims to have made a spectacular discovery off the coast of Mallorca: She reports having seen ...

Dive Into the Exotic World of Nudibranchs, the Spectacular Slugs of the Sea Psychedelic hedgehogs, purple pineapples, living strawberries—these tiny creatures show off their big personalities ...

This new species has been spotted in deep waters along the West Coast, between Oregon and as far south as Southern California, but another may have been spotted in the Mariana Trench in the ...

So, when the Monterey Bay Aquarium Research Institute (MBARI) told us they’d finally unmasked the identity of a mystery mollusk that had been puzzling scientists since it was first spotted in ...

An unusual sea slug with a large hood, a tail with fingerlike projections and glowing bioluminescence has been found living off the West Coast of the US.

Brilliantly coloured, nudibranchs can be easily spotted clinging to rocks and coral. Although these molluscs may seem vulnerable without a hard shell, the bright, patterned skin of some species ...

(CNN) — Researchers have discovered an unlikely new species within the ocean’s midnight zone: a glowing “mystery mollusk.” Although the apple-size species, named Bathydevius caudactylus ...

An unusual sea slug with a large hood, a tail with fingerlike projections and glowing bioluminescence has been found living off the West Coast of the US.

The rare rainbow sea slug, or Babakina anadoni, is typically found in the warmer waters off Spain, Portugal and France.

A rarely seen sea creature called the blue dragon was spotted awash on North Padre Island over the weekend.

The colorful invertebrates are moving north along the California coast as ocean waters warm due to global climate change, scientists say.

Most sea slugs in the nudibranch family are harmless to people - with the exception of the Glaucus Atlanticus known as the blue angel which can sting.