Paratapes undulatusParatapes undulatus, common name undulate venus, is a species of saltwater clam, a marine bivalve mollusk in the family Veneridae, the Venus clams.Distribution and habitatThis species inhabits the inshore shallow sandy seabed in the Indo-West Pacific.DescriptionShells of Paratapes undulatus can reach a length of.Right and left valve of the same specimen:Human cultureThese clams are a popular food in most Asian countries including China, the Philippines, Thailand and Vietnam.