Cretoxyrhina
The Ginsu shark, or Cretoxyrhina, was a mackerel shark that lived during the Late Albian to Campanian of the Late Cretaceous period, more than 100 to 84 million years ago. The sharks looked similar to the modern great white shark, even though the two species are not related.
This apex predator was one of the tops of the Cretaceous seas. They fed on mosasaurs and plesiosaurs. One specimen was even found to have undigested remains of a giant Cretaceous fish. The Cretoxyrhina sharks were more than 23 feet long, and they swam in the Cenomanian-Campanian seas all across the world.