Hybodus
Hybodus sharks were known as “humped tooth” sharks, coming from the genus that existed during the Permian period. They disappeared during the Late Cretaceous, between 303 million and 66 million years ago. The sharks had a traditional streamlined body with two dorsal fins.
The sharks had two types of teeth, which likely helped them catch and eat faster prey, like shellfish and other sea critters. Hybodus were more than six and a half feet long, and scientists believe that these sharks preferred to swim in shallow seas all over the world. The abundant amount of fossils suggests that hybodus were successful predators. It is unsure why the genus became extinct.