Luvaridae

The louvar or luvar (Luvarus imperialis) is a species of marine ray-finned fish, it is the only extant species in the genus Luvarus and family Luvaridae. This taxon is classified within the suborder Acanthuroidei, which includes the surgeonfish, of the order Acanthuriformes, and is the only pelagic species of this order. The juvenile form has a pair of spines near the base of the tail, like the surgeonfish, though they are lost in the adult.

Luvaridae is a family of marine ray-finned fishes belonging to the suborder Acanthuroidei in the order Acanthuriformes, of which they are the only pelagic members. The family has a single extant species, the widespread louvar (Luvarus imperialis) and a small number of known extinct species.

Luvarus is a genus of ray-finned fishes belonging to the family Luvaridae. It is the only extant genus in that family and its only extant species is the cosmopolitan louvar (Luvarus imperialis), with one fossil species (L. necopinatus) known from the earliest Eocene of Turkmenistan.