In a fascinating video, researchers have revealed a new and bizarre see-through species of sea slug floating around the ...

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

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

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

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

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 ...

Living at depths of between 3,300 and 13,100 feet, (1,000 to 4,000 meters), the mystery mollusc (Bathydevius caudactylus) is ...

Monterey Bay Aquarium Research Institute (MBARI) announced Tuesday that they've discovered a new species of sea slug that ...