Cladoselache

Cladoselache was a fast moving prehistoric shark due to its streamlined body and deep forked tail. This primitive shark grew to be a 6 feet in length and roamed the oceans of North America. Cladoselache is one of the best-known prehistoric sharks due to the well preserved fossils that were discovered on the Cleveland shale on the south shore of Lake Erie. The fossils were so well preserved that they included traces of skin, muscle fibers, and internal organs, such as kidneys. Cladoselache had smooth and blunt teeth, which weren't sharp and tearing like those of most sharks and indication that the shark swallowed fish whole after grasping them in its muscular jaws.