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 ) . There were advanced bony fish such as the massive 5-meter long `` Xiphactinus '' -- a fish larger than any modern bony fish .