MBARI researchers have discovered a remarkable new species of sea slug in the deep sea. Nicknamed the "mystery mollusc," the nudibranch Bathydevius caudactylus swims through the midnight zone and lights up with brilliant bioluminescence.

Learn more: https://t.co/4TMZsegLoK pic.twitter.com/6yM019lkOM

— MBARI (@MBARI_News) November 12, 2024