Kalmar “genus” tana nufin rabe-raben haraji da ke haɗa nau’in nau’in nau’i ɗaya ko fiye da ke da alaƙa iri ɗaya. don iya harba kansu daga cikin ruwa da kuma yawo cikin iska na ɗan gajeren nesa.Saboda haka, "Genus Ommastrephes" yana nufin rarrabuwar haraji na rukunin nau'in squid masu tashi.
