Almost nothing is known about the biology and life history of this stingray (1). However, like other stingrays, it is likely to be ovoviviparous, meaning the eggs hatch inside the female and the young are born live (4) (6). Reproduction in this species may be similar to the closely related U. halleri, which mates during the winter, and gives birth to three to six young, after a gestation period of around three months (4). As in many rays and skates, the male bullseye round stingray has much more pointed, curved teeth than the female, an adaptation thought to aid the male in grasping the female’s pectoral fins during copulation (8).
Most stingrays spend a lot of time camouflaged on the sea bed, often partially buried, but can swim rapidly when disturbed or when pursuing prey (3). The diet typically includes bottom-dwelling invertebrates, such as crustaceans, molluscs and worms, and small fish. Prey may be exposed by using the pectoral fins and snout to scoop out holes in the sea bed (3) (4). Although not fatal to humans, the venomous tail spine can cause painful wounds if this stingray is stepped on or disturbed (3) (4) (9).