Hammerheads are a family of sharks that are known for their oddly shaped heads. These sharks reside in oceans worldwide, particularly in warm waters and near the coast. Unlike most sharks, many species of hammerheads are social, and swim in schools during the day. These schools do not remain together overnight however, as hunting is solitary.

A hammerhead shark uses its wide head to trap stingrays by pinning them to the seafloor. The shark's eye placement, on each end of its very wide head, allows it to scan more area more quickly than other sharks can. The hammerhead also has special sensors across its head that helps it scan for food in the ocean.

There are at least nine species of hammerhead shark in the world, although some studies may suggest more. Almost all of them are threatened in some form, many being critically endangered due to human activity. Hammerhead sharks are unlike many other fish in that they give birth to live young. Baby hammerhead sharks are known as pups.

The Great Hammerhead, the largest of the hammerheads, can reach a length of 20 feet, almost the size of a Great White shark. Hammerheads are known for their schooling behavior and consume a variety of prey including rays, other sharks, fish, squid, and crustaceans There are nine species of hammerhead sharks worldwide in the family Sphyyrnidae.

The great hammerhead is the largest of the nine identified species of this shark. It can grow up to 20 feet in length and weigh up to 1,000 pounds, although smaller sizes are more common. Found in temperate and tropical waters worldwide, far offshore and near shorelines, hammerheads are often seen in mass summer migrations seeking cooler water.