 The forward margin of the head is arched, with weak medial and lateral indentations and no prenarial grooves, traits that this species shares with the scalloped bonnethead ("Sphyrna corona").It is distinguished from the scalloped bonnethead by its shorter snout, broadly arched mouth, and deeply concave anal fin.The first dorsal fin is moderately falchate, and the second dorsal fin is as tall as the anal fin.