This species differs from its congeners in having the following characters: relatively long and strong rostrum (5.2-11.5% SL, x = 8.6% SL); rostral spine directed forward and upward; body heavily covered with strong conical bucklers; numerous small and flat bucklers covering dorsal surface between principal bucklers; dorsal and anal fins relatively long, 17.6-29.5% SL and 17.4-24.2% SL, respectively; dorsal surface with black spots; anal fin when fully laid back extends beyond caudal fin base; largest adult body size (up to 136.4 mm) among its congeners 9Ref. 84006).