The diversity of Gastropoda in grati lake district pasuruan east java

Freshwater gastropods are benthic fauna whose live under the water surface or attached to the bottom rocks of the river, pond, or lake. Ranu Grati is a freshwater lake located in District Pasuruan, East Java. Information on gastropod community from this lake is still scarce. We surveyed Ranu Grati from November 2019 until February 2020 to find out the gastropod's diversity. We found 118 individual gastropoda consist of five families and six species. Gastropod's community in Ranu Grati was classified as moderate (H '= 1,415). Morphology of each species will be discussed briefly in this paper.