This research was conducted in February 2020 at Benan Island, Katang Bidara Sub-District, Lingga Regency, Riau Islands Province. This research aimed to determine the value of density, biomass, and carbon stock in seagrass, E. acoroides. The method used in this study was a survey method, the location in which the data was being collected consider representing the waters of Benan Island. The…