The tips of the pelvic fins are rounded; males have thick claspers.

The upper tips of the fins were painted different colors to identify its squadrons.

There may be a white spot at the tips of the pectoral fins.

The anterior tip of the pelvic fins are whitish.

The tips of the fins (except for the pelvic fins) are darker; this is most obvious in young sharks.

The first dorsal fin bears a stout spine in front and originates over the free rear tips of the rounded pectoral fins.

The caudal peduncle and the tips of the fins are pale.

The second dorsal fin is much smaller but similar in shape, and originates over the rear tips of the pelvic fins.

The skin is densely covered by thin, needle-like dermal denticles in a random pattern, except for the lips and the tips of the fins.

The second dorsal fin is about half the size of the first and originates over the rear tips of the pelvic fins.