It turned out to be a new species of sea slug that's perfectly adapted to the deep ocean. It's been over 20 years since researchers were first dazzled by a strange, glowing creature with vibrant ...

Another 20 of the sea slugs were spied on the seafloor between depths of 7,444 and 13,153 feet. This places the species firmly in the midnight or bathypelagic zone, which is a pitch-black section of ...

Some of the most bizarre lifeforms on Earth lurk in the deeper realms of the ocean. There was so little known about one of ...

California researchers this week announced that it is a new species of sea slug. The Monterey Bay Aquarium Research Institute posted video online of the new sea slug floating gently in the depths.