Paratapes undulatus, common name undulate venus, is a species of saltwater clam, a marine bivalve mollusk in the family Veneridae, the Venus clams.
Shells of Paratapes undulatus can reach a length of 6.5 centimetres (2.6 in).
This species inhabits the inshore shallow sandy seabed in the Indo-West Pacific (Red Sea to Papua New Guinea; north to Japan and south to New South Wales).
