Tylosaurus proriger was actually the proper creature in the Evolution's Winners episode of Dinosaur Revolution as identified here http://www.kriskelly3d.com/DR-breakdown/dinosaurrevolution.html
It is the largest of the mosasaurs, reaching lengths of nearly 57 ft.
Facts
Parental Care
Tylosaurus may not been a caring parent, as seen in the episode although it is debated at the time. Tylosaurus may have lived alone and it almost certainly could harm an animal like Archelon.
Food
Tylosaurus ate nearly all of the marine animals in its way.
Tylosaurus attacking a shark