Genus
Orcinus
Orcinus orca. Photo: (c) Vitek Jirinec, some rights reserved (CC BY-NC)
Orcinus is a genus of oceanic dolphin comprising four species: O. paleorca, O. citoniensis, O. meyeri, and O. orca, of which only one (O. orca, e.g., the killer whale) is extant.