In a fascinating video, researchers have revealed a new and bizarre see-through species of sea slug floating around the midnight zone of the deep sea. Nicknamed the "mystery mollusc" by the scientists,

Scientists uncovered the "mystery mollusk," a strange glowing sea creature lurking in the ocean's midnight depths.

Using a remote vehicle, scientists with the institute first noticed what they called a “mystery mollusc” in February 2000 at a depth of 8,576 feet (2,614 meters) in the Pacific. “With a voluminous hooded structure at one end, a flat tail fringed with ...

Advances in technology that enabled the discovery of a new species by California scientists may lead to a better understanding of the ocean’s depths.

More than two decades after spotting a mysterious, gelatinous, bioluminescent creature swimming in the deep sea, California researchers this week announced that it was a new species of sea slug.

Formerly known as the 'mystery mollusk,' this glow-in-the-dark nudibranch is the first of its kind to be seen living in the ocean's ultra-dark midnight zone.

Scientists discovered a fascinating new deep sea animal they call the "mystery mollusc," and captured footage of the glowing nudibranch in its dark ocean habitat.

Scientists from the Monterey Bay Aquarium Research Institute (MBARI) have discovered a new species of nudibranch. They encountered it in the depths of the Pacific Ocean, where no nudibranchs had been found before.