Abstract: Prevalence of enteroparasite in three indigenous fish species Anabas testudineus, Heteropneustes fossilis, and Mystus gulio from six different regions of Vembanad Lake was studied. About 15 species of parasites were identified from the alimentary canal of observed fish hosts. Of the 15 parasites identified, five of them comprised trematode worms; six of them comprised nematode worms, one acanthocephalon, one Ciliophora, one crustacean and one Myxozoa. Most of the parasites were observed in the intestine of host fish. Crustacean Noto diaptomus and nematode Huffmanella sp were present in both stomach and intestine.