While some species of sharks are highly migratory, studies suggest that horn sharks have an extremely small home range of about 11,000 square feet. One was found in the exact spot where it had once been caught, tagged and released 11 years earlier, and the farthest any tagged horn shark has traveled is 10 miles. The scientific name heterodontus means "different teeth," referring to the fact that horn sharks have some teeth that are sharp and some that are used for crushing invertebrates.