Abstract Mangrove ecosystems are brackish forests or mangrove forests that affect macrofauna diversity. One of the types of such macrofauna is the bivalve type. Bivalves have an essential role in the food chain. The role of bivalves is as a detritus feeder and plays a role in the decomposition of mangrove litter. This study is to determine the type and density of bivalves in the mangrove ecosy…