Xiphactinus audax, the X fish skull Pteranodon 5-2 m) long

5-2 m) long

americanum was around 2

probably skimming the water to find prey

dense with blood vessels

stuertzi is often invoked as an example of convergent evolution- with its flat body and huge

Xiphactinus audax, the X fish skull Pteranodon 5-2 m) longXiphactinus audax (from Latin and Greek for "audacious sword ray") was a large, 15 to 20 foot long predatory bony fish that lived in the Niobraran Sea, in what is now North America, during the Late Cretaceous. When alive, the beast would have resembled a gargantuan, fanged tarpon. Skeletal remains of Xiphactinus have come from Kansas, Alabama, and Georgia. Despite being preyed on by sharks and mosasaurs, X. audax was, nonetheless, a voracious predator