Pastinachus gracilicaudus

The narrow cowtail ray possesses several characteristics, including rounded snout, 120-122 pectoral fin radials, 37-40 monospondylous vertebral centra, and the presence of 2 large midscapular pearl thorns.^[2] It can reach the maximum size of 83 cm disc width.^[1] Its reproduction is believed to be viviparous and the birth-size might be 19 - 26 cm disc width.^[1]

This demersal species is usually found on the coastal regions at the depths of 1 - 60 m.^[2][1] Its exact habitat is quite patchy, being believed to be both Indonesian and Malaysian Borneo, Sumatra, Java, and Malay Peninsula.^[2] Several possible threats that directly affect this species are sea pollution, climate change, and over-fishing.^[1]