出典:Wiktionary
From the Ancient Greek ἰχθυοφάγος (ikhthuophágos, “fish-eating”), and substantivised as a plurale tantum proper noun: “the Fish-eaters, the Ichthyophagi”; reinforced in the general sense (“that which consumes fish”) by the English ichthyo- (“fish”) + -phage (“eater”).
ichthyophage (複数形 ichthyophages)