The Tran De Estuary Mangrove (TDEM) forests are located in the Cu Lao Dung and Tran De districts in Soc Trang province. The research for zoobenthos has resulted in the identification of 73 species and 32 families from 54 genera in the ecosystem of the Tran De mangrove estuaries in Soc Trang Province. There are 34 species of Brachyura belonging to 21 genera of 9 families
of Gastropoda were found 22 species of 16 genera and 9 families
and of Bivalvia there were 17 species of 17 genera in 14 families. Of these, eight were recorded for the first time in Vietnam. They are: the Blue fiddle crab (Uca urvillei), the Pinkfingered vinegar crab (Neoepisesarma chentongensis), the Red-clawed mangrove crab (Pseudosesarma bocourti), the Mangrove tree-dwelling crab (Selatium brocki), the Flower crab (Sesarmops intermedius), the
mack mouth nerite (Neritina cornucopia), the Singapore mangrove helmet (Melampus singaporensis) and Trigonal pythia (Pythia trigona). Of the zoobenthos fauna found in this area, many are found in the India-Malaysia region. One of these is the Vinegar crab (Neoepisesarma). Besides the mud crab (Scylla olivacea), there are 7 species which are large enough to be used as human food. In particular, Vinegar crabs (Neoepisesarma) are captured and used as an ingredient in Ba Khia sauce.