California researchers discover mysterious, gelatinous new sea slug
More than two decades after spotting a mysterious, gelatinous, bioluminescent creature swimming in the deep sea, California researchers this week announced that it is a new species of sea slug.
The Monterey Bay Aquarium Research Institute of the new sea slug floating gently in the 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 numerous finger-like projections at the other, and colorful internal organs in between, the team initially struggled to place this animal in a group," the institute said in a statement Tuesday.
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. It lives in the so-called midnight zone, an area of deep ocean known for "frigid temperatures, inky darkness, and crushing pressure," the statement said.
The findings were published in the journal .
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This undated photo provided by Monterey Bay Aquarium and Research Institute, shows a mystery mollusk (Bathydevius caudactylus) observed by MBARI's remotely operated vehicle (ROV) Doc Ricketts in the outer Monterey Canyon at a depth of approximately 1,810 meters. Credit: MBARI via AP -
This undated photograph, provided by Monterey Bay Aquarium and Research Institute, shows a mystery mollusc (Bathydevius caudactylus), observed by MBARI's remotely operated vehicle (ROV). Credit: MBARI via AP -
This undated photo provided by Monterey Bay Aquarium and Research Institute, shows a mystery mollusc (Bathydevius caudactylus) observed by MBARI's remotely operated vehicle (ROV) Tiburon in the outer Monterey Canyon at a depth of approximately 1,550 meters. Credit: MBARI via AP
More information: Bruce H. Robison et al, Discovery and description of a remarkable bathypelagic nudibranch, Bathydevius caudactylus, gen. et. sp. nov., Deep Sea Research Part I: Oceanographic Research Papers (2024).
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