INTRODUCTION: Phylum platyhelminthes includes two classes of parasitic flateworms which are TREMATODES and CESTODES. TREMATODES are leaf like and falls into two main subclasses Monogenea which has direct life cycle while Digenea requires intermediate host. Monogenea are the mainly external parasites of fish while digenea are of exclusively the parasites of vertebrate. Adult Digenetic trematodes ...