6 Types of Sharks Every Selachimorphaphile Should Know

There are about nine shark species in the Heterodontidae, or bullhead shark, family. (Confusingly, the bull shark isn’t one of them.) Bullhead sharks are small bottom feeders with wide heads, hence the name “bullhead.”

One of the most famous bullheads — and the largest — is the Port Jackson shark (Heterodontus portusjacksoni), an Australian species that can reach up to 5.4 feet (1.65 meters).