The Sonteul Fishery System in the Seomjingang River Estuary, Korea, maintains marsh clam populations through traditional hand net methods. Unlike other areas, this ecosystem supports the species thanks to local efforts enhancing environmental diversity. This sustainable fishing, removing pollutants and promoting aquatic health, supports locals' livelihoods alongside agriculture. The annual marsh clam festival and fishing season attract tourists, celebrating this unique cultural landscape from April to November.