Mollusca is the largest marine, phylum about 23% of all the named marine organism.1 The gastropods, more commonly known as snails and slugs, are a large taxonomic class within the phylum Mollusca according for 80% of total mollusca.2 Fresh water gastropods are divided in to two subclasses, Prosobranchia and Pulmonata. Most of the species associated as intermediate hosts of helminthes parasite.3...
