The feeding habits and selectivity of Macrobrachium borelliiwere studied by examining the stomach content of specimens from anox-bow lake across one year. M. borellii isomnivorous-carnivorous, feeding largely on members oflittoral-benthic communities. The bulk of the stomach content wasformed by oligochaetes, dipteran larvae, and a variety of organismsranging from algae to palaemonids. Copepods and cladocerans were analternative food source in winter, at low-water, when macrophytes haddeclined. Oligochaetes and dipteran larvae were positively, algae andmicrocrustaceans negatively selected.