Since a little information is available in relation with feeding of Lutjanus johni, this study was conducted to determine its food diversity. 613 specimens were studied from May 1996 to July 1997 and their dietary regim was defined. In this study, capacity vacuous index (CV) and food preference (Fp) calculated for this fish. The study of stomachs showed that stomach of 44 fish were full, 27 semifull and 524 were empty. CV was obtained 88.4 and Fp for crustacean (55.6), fishes (44.3) and molusca (1.4). In particularly study, Fp calculated for crab (54.0), squilla (23.2), shrimp (20.2) and lobster (2.5). Ultimately, in this survey was found that this fish possibly is fast feeder and crustacean to be omposed their main food. Among crustacean, crab is main food
