Sharks as a species are still going strong ... was found undigested inside of a fossilized Cretoxyrhina. Cretoxyrhina wasn’t at the top of the food chain, however, as it was hunted by larger ...

Cretoxyrhina was one of the largest sharks and a formidable predator in the Late Cretaceous seas. Nicknamed the Ginsu shark after the kitchen knife that slices and dices, Cretoxyrhina ripped apart ...

A 13-foot-long (4-meter-long) Xiphactinus could open its jaw wide enough to swallow six-foot-long (two-meter-long) fish whole, but it itself was occasionally prey to the shark Cretoxyrhina.