Sharks are a group of elasmobranch fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Modern sharks are classified within the clade Selachimorpha and are the sister group to the rays.
Ka-Zar of Prehistoria[]
Sharks are one of Prehistoria's only modern animals and they are one of the top predators in it's seas. They are called Zupisa by many prehistoric tribes of cavemen and would sometimes hunt them for food. Sharks mostly hunt in the reefs of the Gorahn Sea which their prey consist of Sea Turtles, Ichthyosaurs, and Archelon. Some shark are prehistoric species such as Cretoxyrhina.