Bonnethead targeted by commercial and recreational fisheries, and constitutes up to 50% of all small shark landings in the Eastern US. Bonnethead The bonnethead shark or shovelhead ("Sphyrna tiburo") is a small member of the hammerhead shark genus "Sphyrna", and part of the family Sphyrnidae. It is an abundant species on the American littoral, is the only shark species known to display sexual dimorphism in the morphology of the head, and is the only shark species known to be omnivorous. Characterized by a broad, smooth, spade-like head, it has the smallest cephalofoil (hammerhead) of all "Sphyrna" species. The body is grey-brown
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