Disc broadly suboval (as wide as long); anterior margin of disc weakly convex; snout rather short and broadly triangular; tail narrow-based, subcircular in cross-setion, slender, whip-like beyond sting; denticle band very broad, well-defined and developing rapidly with growth (fully developed by 30 cm DW); usually pearl-shaped thorns on back (anteriormost largest); no thorns or skin folds on tail; tail beyond caudal sting densely granular. Body colour uniform brownish, greyish to greenish above, white below; tail blackish behind sting.