Round stingray

"Round stingray" may also refer to Taeniura grabata.

Urobatis halleri also known as the Round stingray or Haller's round ray is a species of round ray, family Urotrygonidae, found in the coastal waters of the eastern Pacific Ocean. It is a small, common ray that feeds mostly on benthic invertebrates. On the beaches of southern California, it is responsible for numerous injuries to bathers, who are stung when they accidentally step on the fish. The wound caused by its venomous spine can be painful, but is non-fatal.