Great Hammerhead Shark Endangered species art – Watercolor, June 2016 The great hammerhead is the largest of the hammerhead shark family. They can reach a maximum of 20 feet long. They can be distinguished from other hammerhead species by their broad, nearly straight “hammer” which is called a cephalofoil, and their very tall sickle-shaped dorsal fin. Great hammerheads are typically a solitary nomadic predator. They inhabit tropical and temperate waters worldwide - from insho