The giant stumptail stingray, Dasyatis gigantea, is a species of stingray in the family Dasyatidae, known from only two specimens collected from the Peter the Great Bay in the Sea of Japan. This large species is characterized by rhomboid pectoral fin disc wider than long, a relatively long snout, and a short, blunt tail (though tail damage experienced by the original rays caught is a possibility). The International Union for Conservation of Nature (IUCN) has listed this species as Data Deficient and recommended further study.