· Hammerheads use their oddly shaped heads to pin their favorite meal, stingrays, to the sea floor when they attack them.
· One group of sensory organs is the ampullae of Lorenzini, which allows sharks to detect, among other things, the electrical fields created by prey animals. The hammerhead's increased ampullae sensitivity allows it to find its favorite meal, stingrays, which usually bury themselves under the sand.
· Found in temperate and tropical waters worldwide, far offshore and near shorelines, hammerheads are often seen in mass summer migrations seeking cooler water.
· They are gray-brown to olive-green on top with off-white undersides, and they have heavily serrated, triangular teeth. Their extra-tall, pointed dorsal fins are easily identifiable.
Watch the great hammerhead swims along the ocean floor.
Researchers risk all to haul a shark onto the boat.(02:46)