Microplastics are plastic particles smaller than 5 mm that are widely found in aquatic environments and have the potential to enter the bodies of aquatic organisms, including crabs. This study aims to determine the abundance, types, and polymer composition of microplastics in Fiddler Crabs (Uca spp.) inhabiting the Musi River Estuary, South Sumatra. The soft tissues of crab samples were digeste…