Cladoselache is one of the first prehistoric sharks (but it's shark in fossils are complete). Cladoselache possessed a slender body obviously adapted to the rapid movement but not to change direction quickly. His wide swaddling paddles at the front served him, no doubt, to govern and maintain his position while he was swimming. The size of Cladoselache is estimated to be about 2 meters long and feeds on fish and crustaceans but it is also, unfortunately, the prey of big fish like Dunkleosteus
Cladoselache made an appearance in Monster Rivers: Prehistoric Terror "and in" Prehistoric Monsters Revealed ").