The Family Sphyrnidae, commonly known as hammerhead sharks, encompass a variety of species within the shark family. Some of the synonyms for the word family Sphyrnidae include hammerhead family, Sphyrnidae family, and Sphyrninae. These sharks are named for their unique head shape, which resembles a hammer or mallet. The family includes nine species, ranging in size from just a few feet long to up to 20 feet in length. Hammerhead sharks are found worldwide in warm waters, and they typically feed on smaller fish and crustaceans. Despite their imposing appearance, these sharks are typically not considered a threat to humans in the wild.