Mangrove area in the Madong Village has been decrease due to anthropogenic activities. Decrement in mangrove ecosystem may negatively affect the aquatic organisms in general, including bivalves. To understand the bivalve community structure in the mangrove ecosystem, a research was conducted on July 2019. There were 3 line transects and, in each line, there were 9 plots (1×1 m) placed. Re…