Climatius

Climatius (meaning inclined fish or tilted fish) is an extinct genus of spiny shark. Fossils have been found in both Europe and North America.
Climatius was an active swimmer judging from its powerful caudal fin and abundant stabilizing fins, and probably preyed on other fish and crustaceans. Its lower jaw was lined with sharp teeth which were replaced when worn, but the upper jaw had no teeth. It also had large eyes, suggesting that it hunted by sight.