5. Edestus giganteus

Also known as the “scissor-tooth shark”, it could reach up to 20 feet in length, the size of a modern great white shark. Its distinguishing feature is its single row of teeth in each jaw that resembles a huge pair of pinking shears. Despite their relatively smaller size compared to those sharks mentioned above, the Edestus were vicious hunters. The wear patterns discovered on their teeth suggest that they would often vertically thrash the prey, giving slash wounds to incapacitate them and then swallow.