iny ▁chrom is ▁dam self ish ▁( A can th och rom is ▁poly ac anth us ). ▁Ad ult ▁cor al ▁tr out ▁also ▁eat ▁ju ven iles ▁of ▁their ▁own ▁species . ▁Ind ividual ▁cor al ▁tr out ▁usually ▁feed ▁once ▁every ▁ 1 – 3 ▁days , ▁although ▁they ▁may ▁go ▁for ▁many ▁days ▁without ▁feed ing . ▁About ▁ 9 0 % ▁of ▁a ▁pre y ▁item ▁will ▁be ▁dig ested ▁within ▁ 2 4 ▁hours . ▁Cor al ▁tr out ▁only ▁feed ▁during ▁day light ▁hours , ▁most ▁often ▁at ▁d usk ▁and ▁dawn . ▁ ▁Cor al ▁tr out ▁h unt ▁by ▁amb ush ▁and ▁by ▁pro w ling . ▁They ▁use ▁the ▁amb ush ▁method ▁to ▁h unt ▁fish ▁that ▁live ▁among ▁the ▁cor al ▁on ▁the ▁re ef ▁bottom . ▁The ▁tr out ▁hide ▁and ▁remain ▁very ▁still ▁and ▁alert , ▁ready ▁to ▁attack ▁passing ▁pre y . ▁The ▁pro w ling ▁method ▁is ▁used ▁to ▁h unt ▁school ing ▁fish ▁higher ▁up ▁in ▁the ▁water . ▁Here , ▁the ▁tr out ▁will ▁move ▁( pro w l ) ▁slowly ▁towards ▁the ▁pre y ▁and ▁attack ▁at ▁great ▁speed . ▁Ind ividual ▁cor al ▁tr out ▁have ▁different ▁feed ing ▁behav iors , ▁possibly ▁explaining ▁the ▁vari ability ▁in ▁growth ▁and ▁m atur ity . ▁ ▁Cor al ▁tr out ▁in ▁the ▁southern ▁Great ▁Bar rier ▁Re ef ▁feed ▁mainly ▁on ▁par rot ▁fish ▁( family ▁Sc ar idae ) ▁and ▁hard y head ▁b