Adults consume relatively more bony fish and cephalopods, and fewer crustaceans, than juveniles. Known parasites of this species include the monogeneans Hexabothrium appendiculatum and Leptocotyle major, the tapeworm Acanthobothrium coronatum, the trypanosome Trypanosoma scyllii, the isopod Ceratothoa oxyrrhynchaena, and the copepod Lernaeopoda galei.
Adults of this species exhibit a higher consumption of bony fish and cephalopods compared to juveniles, while consuming fewer crustaceans.  The parasites affecting these animals include Hexabothrium appendiculatum and Leptocotyle major (monogeneans), Acanthobothrium coronatum (tapeworm), Trypanosoma scyllii (trypnosome), Ceratothoa oxyrrhynchaena (isopod), and Lernaeopoda galei (copepod).