The shark is characterized by a broad, smooth, spade-like head: it has the smallest cephalofoil … See more

Bonnethead sharks are the only sharks known to exhibit sexual dimorphism in the morphology of the head. Adult females have a broadly rounded head, whereas males possess a distinct bulge along the anterior ma… See more

Using data from mtDNA analysis, a scientist has found that the evolution of hammerhead sharks probably began with a taxon that had a highly pronounced cephalofoil (most likely that similar to the winghead s… See more

This species occurs on both sides of the American coast, in regions where the water is usually warmer than 70 °F (21 °C). In the Atlantic, it ranges from New England, where it is rare, to the Gulf of Mexico and Brazil, and in the … See more