The feeding ecology of four species of fish is described in terms of associations of body form, feeding structures, and stomach contents; and of seasonal variations in diet. Black bream, Acanthopagrus berda (Forskal, 1775), and the hair‐finned goby, Ctenogobius criniger (Valenciennes, 1837), are predominantly carnivorous; milk‐spotted toadfish, Chelonodon patoca (Hamilton‐Buchanan, 1822), largely omnivorous; and bony bream, Anodontostoma chacunda (Hamilton‐Buchanan, 1822), detritivorous. The results illustrate the role of a mangrove creek in the ecology of the four species of fish and show the mangrove creek provides a nursery for A. berda and C. patoca.