The pincushion ray or thorny freshwater stingray (Dasyatis ukpam) is a little-known species of stingray in the family Dasyatidae, found in the rivers and lakes of West Africa. A heavy-bodied ray measuring up to 1.2 m (4 ft) across, this species can be distinguished by its rounded pectoral fin disk, reduced or absent stinging tail spine, and—in adults—numerous stout thorns covering its back and tail.