 The first dorsal fin is low with a minute leading spine; the second dorsal fin is twice as high as the first with a much larger spine.The caudal peduncle is short, leading to a long caudal fin with the upper lobe much larger than the lower.The dermal denticles of this shark are tiny and densely placed with no regular pattern; each denticle has a four-cornered base and rises to a narrow, slightly curved point.