Research on Gastropod Community Structure in Seagrass Ecosystem of Binasi Beach Waters, Central Tapanuli Regency, North Sumatra Province was conducted in may-june 2023. This study aims to determine the structure of the gastropod community in seagrass ecosystems in the waters of Binasi Beach, Central Tapanuli Regency, North Sumatra Province which includes, Seagrass density, Gastropod Density, Di…