Scalloped bonnethead young are born at 23 cm or above; an adolescent male has been recorded at 51 cm long, and an adult at 67 cm. It may be taken by local inshore fisheries, but data are lacking. It feeds on or near the bottom, on crustaceans, molluscs, cephalopods, echinoderms, and bony fishes. Scalloped bonnethead The scalloped bonnethead ("Sphyrna corona") is a rare, little-known species of hammerhead shark, and part of the family Sphyrnidae. Its other common names include the mallethead shark and the crown shark. It is found in tropical and subtropical waters in the eastern Pacific Ocean, from Mexico to
Scalloped bonnethead mallet-shaped head, called a cephalofoil, is moderately wide (24-29% of total length) and elongated lengthwise. The front margin is broadly arched, with shallow lateral and medial indentations, and no prenarial grooves. The mouth is small and strongly arched. The anal fin is long and has a nearly straight rear margin. Its coloration is gray above and white below, with no prominent fin markings. The similar scoophead ("Sphyrna media") can be distinguished by a shorter snout, a broader mouth, and a deeply concave anal fin margin. Like other hammerheads, the scalloped bonnethead is viviparous, with presumably two pups per litter. The