Abstract One of the village in Sungai Apit District is Rawa Mekar Jaya Village. Desa Rawa Mekar Jaya has an area of about 16,000 ha, with a mangrove forest area of about 25 ha. Rawa Mekar Jaya, as one of the mangrove growth areas, is thought to have provided a sufficient supply of litter for aquatic organisms. This study aims to determine litter production and litter decomposition rate in mang…