Abstract: Food compositions in stomachs of adult left-eyed flounder of 150—245 mm length collected from south Bohai Sea from July 1982 to July 1983 are analysed in this paper. The results show that lefteyed flounder (Paralichthys olivaceus) is a predatory fish. There are more than30 species of animals ingested by it. It feeds chiefly on fishes (e. g. Clupanodon puncatatus, Engraulis japonicus, Setipinna taty, Chaeturichthys hexanema and Cynoglossus joyneri), crustaceans (e. g. Oratosquilla oratoria, Alpheus distinguendus, Alpheus japonicus and Crangon affinis) and molluscs such as Loligo japonica. Fishes (80.9%) and crustaceans (18.6%) are ingested in spring, fishes (83.5%) and mollusca (13.1%) in summer,fishes (87.9%) in autumn and fishes (73.2%) and crustaceans (19.7%) in winter.

Key words: Feeding habit, Ingestion, Seasonal variation, Paralichthys olivaceus, South Bohai Sea