Periphyton is a sessile microscopic organism that attach on aquatic vegetation.A research aims to understand the community structure (types and abundance)of periphtyon in the mangrove ecosystem of the Sungai Rawa Village, has been conducted from June to July 2018.There were 3 sampling area, close to the settlement area, in the ecotourism area and in the natural area with no human inhabitant. Th…