Don Hoi Lot. 05/07/01; Samut Songkhram Province; 87,500 ha; 13°21'N 099°59'E. A rare type of natural wetland for Thailand, comprising sandbars at the mouth of the Mae Klong river with a vast area of intertidal mudflats, an extremely productive location for the Hoi Lot (Solen regularis), an economically important mollusc unique to this region. Characterized by dynamic coastal features of the Bight of Bangkok in the Gulf of Thailand, formed from river and marine sediments extending some 8km from shoreline into the sea with less than a 1% slope. Mangroves are present along the shoreline on the east side. In addition to its 10 economically important mollusc species, the site is also important for tourism attracted to the natural environment, local identity, traditional fisheries and fishing technologies, seafoods and other fishery products. Development projects are perceived as a potential threat, and water pollution from upriver industries, urban and agricultural runoff present major problems, as do encroachment of mangroves for aquaculture and tourist infrastructure, to the extent that extinction of Solen regularis is feared without more effective management. A management plan has been approved by the National Environment Board but not yet budgeted for. Ramsar site no. 1099. Most recent RIS information: 2001.