Kalmar "Genus Orcinus" tana nufin rarrabuwa taxonomic wanda ya haɗa da takamaiman rukunin dabbobi masu shayarwa na ruwa da aka sani da killer whales. Orcinus shine sunan jinsin killer whale, wanda kuma ake kira orca. Killer whale shine mafi girma a cikin dangin dolphin kuma ana samunsa a cikin tekuna a duniya. Sunan "killer whale" ya fito ne daga gaskiyar cewa su mafarauta ne kuma suna farauta da kashe wasu dabbobi masu shayarwa a cikin ruwa, irin su hatimi da dolphins.