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.
This time we follow Lupin III through a forgotten land populated by prehistoric life. The best way I could describe it is that its like Indiana Jones meets Jurassic Park.