Mosasaurus ("lizard of the Meuse River") is the type genus of the mosasaurs, an extinct group of aquatic squamate reptiles. It lived from about 82 to 66 million years ago during the Campanian and Maastrichtian stages of the Late Cretaceous.
On a remote island, Danny and his friends are invited by a wealthy businessman/genetic scientist named Dr. Richard Horner to be the firsts guests of an all new wildlife theme park of de-extinct prehistoric creatures called "DinoLand"