The Pneumodermatidae are a family of sea angels, or small floating predatory sea snails or sea slugs.

They are pelagic marine heterobranch opisthobranch gastropod mollusks in the clade Gymnosomata.

These 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.

[1] Genera within the family Pneumodermatidae include: Genus: Pneumoderma de Roissy, 1805 Genus: Pneumodermopsis Keferstein, 1862 Genus Schizobrachium Meisenheimer, 1903 Genus Spongiobranchaea d'Orbigny, 1836 Genus Abranchaea Zhan Fu-Sui, 1975 Genus Platybrachium Minichev, 1976