Abstract This study aims to determine the diversity of gastropods and water conditions in Sironjong Gadang Island, South Coastal Regency. This research was conducted in August 2022. The research location consists of 3 stations. Along the transect line placed 3 plots with a size of 1m x 1m. the results of the study found gastropod species consisting of 4 (four) families, 4 (four) genus, 8 (…