Right - Dasyatis sabina Dasyatids have an enlarged pectoral disk, circular to rhomboid in shape with a rounded or angular snout. The mouth is small and subterminal, the spiracles located close behind the eyes and the pelvic fins are singled-lobed. More than one of the barbed and venomous caudal spines may be present. Represented circumglobally in temperate and tropical seas, from nearshore to uppermost continental slope. It is found circumglobally in tropical and temperate seas.
Lateral teeth tend to be transitional between their posterior and anterior counterparts.
The anteriors are the largest teeth in the lower jaw and laterals, the largest in the upper. In Pteroplatytrygon violacea , both males and females have cuspidate teeth, an apparent advantage for its pelagic life style. The dasyatid tooth is readily distinguishable from most other batoids. The primary characteristic are the bilobate roots. The lobes are low, elongated and lingually directed.