This Xiphactinus jaw reveals the hunting strategy of one of the ocean's most efficient predators. Nine original teeth, including one massive fang, line the bone like a row of daggers. These fish didn't chew their prey. They seized it whole with their gaping jaws and swallowed it in one gulp. Fossilized Xiphactinus have been found with six-foot fish still lodged in their throats.

Eighty-three million years ago, Kansas lay beneath a vast inland sea. Xiphactinus prowled these warm waters alongside mosasaurs, plesiosaurs, and giant sea turtles. Growing up to twenty feet long, they resembled enormous, fanged tarpon. The powerful jaw structure and forward-facing teeth show a fish built for speed and ambush. This specimen comes from the famous Smoky Hill Chalk, one of the world's richest deposits of Late Cretaceous marine life.