Golden sea slugs are small, measuring about a tenth of an inch, the study said. They have two “slender” horn-like structures on their head and other outgrowths along their “elongated” body.

The underwater slug, which propels itself to swim by closing its hood like a jelly, also contains “colorful internal organs in between.” It lives at depths up to 13,100 feet on the sea floor ...

Researchers have discovered a new species of glowing sea slug deep in the ocean’s midnight zone. Monterey Bay Aquarium Research Institute (MBARI) scientists said in a press release on Tuesday ...

Bathydevius caudactylus is the first known sea slug to live in the deep water column. It lives in the ocean’s midnight zone–a wide area of open water about 3,300 to 13,100 feet below the surface.

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.

New Sea Slug (MBARI)After reviewing more than 150 sightings of the creature and studying it in a lab, researchers determined it was a new type of nudibranch, or sea slug.