"Everyone in the control room let out a loud 'Oooooh!' at the same time. We were all enchanted," a researcher said.

Researchers describe a new nudibranch that is genetically drastically different from its closest relatives.

This critter lurks in the ocean's midnight zone, has a voluminous hood, is completely see through and is bioluminescent. It's ...

MBARI researchers have classified the new species as Bathydevius caudactylus, colloquially called the "mystery mollusc." ...

A new glowing nudibranch species is the first known to swim through the ocean’s midnight zone and has unique adaptations for ...

This bizarre creature was spotted 8,576 feet below the ocean surface.

Researchers have discovered a remarkable new species of sea slug that lives in the deep sea. Nicknamed the 'mystery mollusc,' the nudibranch Bathydevius caudactylus swims through the ocean's midnight ...

Most sea slugs use their raspy tongues to feed on prey that is attached to the seafloor. Instead, Bathydevius caudactylus ...

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

More than two decades after spotting a mysterious, gelatinous, bioluminescent creature swimming in the deep sea, California ...

A “remarkable” new sea slug nicknamed the “mystery mollusc” has been discovered swimming deep in the ocean’s “midnight” zone.