Other marine life included sharks such as Squalicorax and the giant shellfish-eating Ptychodus mortoni ( believed to be 10 meters long ) ; and advanced bony fish including Pachyrhizodus , Enchodus , and also the massive 5-meter long Xiphactinus - a fish larger than any modern bony fish .
Other marine life included sharks such as Squalicorax and the giant shellfish-eating Ptychodus mortoni ( believed to be 10 meters long ) .