noun🔗ShareコウイカAny of various squid-like cephalopods (marine mollusks) of the order Sepiida that have eight arms, two retractable tentacles, and a calcareous internal shell, and can eject a dark ink when threatened"The diver photographed a cuttlefish changing its color to blend in with the coral reef. "ダイバーは、サンゴ礁に溶け込むために色を変えているコウイカを写真に撮りました。animalfishoceanbiologyChat with AIVocabulary GamePractice Reading