The hammerhead shark has a distinctive head shape: It looks like a hammer.Hammerhead sharks feed on sardines, herring and mackerel. In the past it was thought that they killed prey by hitting it with their heads. Now we know that the unusual head shape allows improved vision. Just like the hammerhead shark, the eyes are located on the outside left and right of their head and give the predator a 360 degree view. The snout allows them to sense electromagnetic signals of their prey.