Clionina

Taxobox
name = "Clionina"
regnum = Animalia
phylum = Mollusca
classis = Gastropoda
subclassis = Orthogastropoda
ordo = Opisthobranchia
subordo = Gymnosomata
familia = Clionidae
genus = "Clionina"
subdivision_ranks = Species
subdivision = See text.

"Clionina", commonly known as sea angels or pteropods, is a genus of small floating sea slugs, pelagic marine opisthobranch gastropod mollusks in the family Clionidae.

They are very small and gelatinous, mostly transparent, and they only have a shell during their embryonic stage.