One side of the nudibranch — known colloquially as a sea slug — is a “voluminous hooded structure at one end” with a “tail fringed with numerous finger-like projections at the other ...

Marine biologists have found a new sea slug that is right at home in the ocean’s deep and dark midnight zone. With a large, gelatinous hood, tail like a paddle, and bright bioluminescence Bathydevius ...