Evidence suggests Cretoxyrhina fed on mosasaurs, plesiosaurs, and even the giant bony fish Xiphactinus, a fierce predator itself. Sharks are made of cartilage, which does not fossilize well.

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.

One of the newest aquatic marvels that has been taking over the Ark world is the mighty Xiphactinus, which comes from the popular Ark Additions mod series. Popular mode transitions to the main ...