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One hundred and twenty mod fish, Cirrhinus mrigala (Hamilton, 1822), were examined over a period of one year, Mard, 1998 to February, 1999 at Govt. Fish Hatchery Mian Channu Punjab, Pakistan. The parasites recovered were Lernea cyprinacea, L. polymorpa, L. oryzophila, L. lophiara and Lernaea sp. The overall prevalence was highest (43.33%) for L. cyprinacea and lowest for L. lophiara (4.16%).