Western Inside Seaway: 80 million years in the past, this historical sea divided North America into two landmasses, Laramidia and Appalachia, reaching depths of two,500 toes and lengths of over 2,000 miles.

Tylosaurus: A dominant predator of the Western Inside Seaway, Tylosaurus might develop as much as 46 toes lengthy and weigh roughly 18,800 kilos, showcasing exceptional velocity and agility.

Mosasaurus hoffmanni: This large marine reptile, doubtlessly reaching lengths of fifty to 56 toes, was the biggest marine predator of its time, with a chunk pressure estimated to be 4 occasions better than that of an important white shark.

Dinosuchus: The most important crocodile in historical past, Dinosuchus might develop as much as 40 toes lengthy and weigh over 17,600 kilos, possessing a chunk pressure able to crushing bones and even attacking massive dinosaurs.

Aralon: This monumental turtle, measuring 15 toes in size and weighing 4,800 kilos, was a formidable creature of the Cretaceous interval, usually falling prey to bigger mosasaurs regardless of its dimension and hard shell.

Zygorhiza: A large ray-finned fish, Zygorhiza reached lengths of 13 to twenty toes and was recognized for its aggressive feeding habits, usually consuming something it might catch, together with smaller fish and even younger mosasaurs.

Parapuzosia: The most important recognized ammonite, Parapuzosia had a shell diameter of as much as 11.5 toes and weighed roughly 3,300 kilos, making it the heaviest invertebrate of all time, thriving within the Western Inside Seaway.