Disc lozenge-shaped, much broader than long (1.7–2.1 times); tail long, its length 1.9–3.2 in DW; dorsal fin absent; no tentacle on posterior margin of spiracle; caudal stings variously present or absent. Body colour dorsal surface usually plain, sometimes with faint pale spots; ventral side whitish to brownish; tail banded, dark spot frequently between each black band; tail banding less well defined in very large individuals.