sentences:  Measuring up to across, this species has a rhomboid pectoral fin disc, a lower (but not upper) fin fold on the tail, and numerous dermal denticles along the back and behind the stinging spine.The longtail stingray feeds mainly on bottom-dwelling bony fishes and crustaceans.It is aplacental viviparous, with females giving birth to 1–5 young in late summer.