Disc very broad and short (disc slightly longer in adult females); pectoral fins weakly falcate, joining head below eye, separatefrom rostral lobe; caudal sting absent; spiracles lateral, not visible in dorsal view, tail long, its length about 3.0–4.4 in length of body; disc smooth, without thorns or denticles; dorsal fin origin just behind pelvic fin insertion. no spots on disc; tail shorter, its length about 1.4–1.8 in length of body; rostral lobe more rounded; dorsal fin origin at level of pelvic fin insertions. Dorsal disc surface greyish brown; disc with 5–8 pale blue (sometimes dark-edged) transverse bands beginning at interorbital region; bands becoming faint in large adults; faint banding present on tail; ventral surface white with brownish pectoral fin apices