Cretoxyrhina (SciiFii)

The Ginsu shark (Cretoxyrhina modernus, name meaning "Cretaceous sharp-nose of modern times") is a species of large mackerel shark that originally lived about 107 to 73 million years ago during the late Albian to late Campanian of the Late Cretaceous period in every ocean as an extinct species, C. mantelli, and was once extinct, but has since been brought back from extinction by SciiFii and introduced throughout the world's oceans to help boost biodiversity. The Ginsu shark is commonly referred to as such in reference to the Ginsu knife, as its feeding mechanism is often compared with the "slicing and dicing" when one uses the knife. Measuring up to 8 meters (26 feet) in length and weighing up to 3,400 kilograms (3.3 long tons; 3.7 short tons), the Ginsu shark is one of the largest sharks that originally lived during the Mesozoic. Having a similar appearance and build to the great white shark (with the exception of having a gray skin with white spots and stripes which resemble those of whale sharks), it is an apex predator in its ecosystem and preys exclusively on mosasaurs and plesiosaurs, other sharks and non-shark large fish, pterosaurs, and occasionally dinosaurs (including birds). Its teeth, up to 8 centimeters (3 in) in height, are razor-like and have thick enamel built for stabbing and slicing prey. The Ginsu shark is also among the fastest-swimming sharks, being capable of pursuing prey with burst speeds of up to 70 kilometers per hour (43 mph). It hunts by lunging at its prey at high speeds to inflict powerful blows, similar to the great white shark, and relies on strong eyesight to do so. The Ginsu shark possesses facial and optical features most similar to that in thresher sharks and crocodile sharks and has a hydrodynamic build that allows the use of regional endothermy. As an apex predator, the Ginsu shark plays a critical role in the marine ecosystems it inhabits. It is a cosmopolitan species and it is been found worldwide, although most frequently in the Pacific Ocean off the coast of North America. It prefers mainly subtropical to temperate pelagic environments, but is known in waters as cold as 5 °C (41 °F).