Hydromylidae
The Hydromylidae are a taxonomic family of small sea slugs, marine opisthobranch gastropod mollusks in the suborder Gymnosomata, the sea angels. "Hydromyles" species are pelagic, carnivorous and viviparous. Description. The small pelagic snails lack shells (except in their early embryonic stage). They are carnivores, equipped with swimming parapoda (fleshy, wing-like outgrowths), strong jaws and grasping tentacles, often with suckers resembling those of cephalopods. Genera and species. Genera and species within the family Hydromylidae include: Genus "Hydromyles"