ait ▁fish ▁( family ▁A ther in idae ). ▁The ▁most ▁common ▁pre y ▁items ▁further ▁north ▁are ▁the ▁dam self ish ▁( P om ac entr idae ) ▁and ▁fus ili ers ▁or ▁ban ana ▁fish ▁( Ca es ion idae ). ▁One ▁study ▁showed ▁cor al ▁tr out ▁e ating ▁schools ▁of ▁fus ilers ▁in ▁summer , ▁and ▁scar ids ▁during ▁the ▁winter . ▁This ▁season al ▁variation ▁is ▁quite ▁common ▁in ▁the ▁di et ▁of ▁cor al ▁tr out ▁due ▁to ▁varying ▁abund ances ▁of ▁pre y ▁at ▁different ▁times ▁of ▁the ▁year . ▁Tr out ▁also ▁tend ▁to ▁eat ▁more ▁food ▁in ▁winter , ▁possibly ▁to ▁increase ▁fat ▁stores ▁in ▁prepar ation ▁for ▁reprodu ction ▁in ▁spring . ▁ ▁They ▁sometimes ▁eng age ▁in ▁co oper ative ▁hunting ▁with ▁the ▁giant ▁mor ay ▁( G ymn oth or ax ▁jav an icus ), ▁the ▁hum p head ▁wr asse ▁( Che il inus ▁und ul atus ), ▁or ▁the ▁big ▁blue ▁oct opus ▁( Oct opus ▁cy ane a ). ▁ ▁Queensland , ▁Australia ▁has ▁a ▁significant ▁cor al ▁tr out ▁fish ery . ▁Fish erm en ▁catch ▁the ▁tr out ▁using ▁hand ▁lines , ▁with ▁pil ch ards ▁for ▁b ait , ▁operating ▁from ▁small ▁d ories ▁or ▁run about s ▁throughout ▁the ▁day , ▁then ▁returning ▁to ▁a ▁mother ▁ship ▁where ▁the ▁catch ▁is ▁kept ▁live ▁in ▁t anks ▁until ▁the ▁return ▁to ▁port ▁after ▁several ▁days ▁working ▁at ▁sea . ▁ ▁Par as ites ▁As ▁most