Paratapes undulatus, common name undulate venus, is a species of saltwater clam, a marine bivalve mollusk in the family Veneridae, the Venus clams.
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).
Shells of Paratapes undulatus can reach a length of .
<div align=center> Right and left valve of the same specimen:
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These clams are a popular food in most Asian countries including China, the Philippines, Thailand and Vietnam.