Kalmar “genus” kalma ce da ake amfani da ita a fannin ilmin halitta don yin nuni ga matsayi na haraji da aka yi amfani da shi wajen rarraba rayayyun halittu. Ana amfani da shi don haɗa nau'ikan nau'ikan da ke da kakanni ɗaya da wasu halaye. Ana samun waɗannan kifaye a cikin ruwan zafi na bakin teku a wurare masu zafi da na wurare masu zafi na duniya, kuma yawancin mutane suna amfani da su azaman tushen abinci.