A fat mosasaur tooth in  a floating display frame.
 
Location: Khouribga, Morocco
 
Age:70-66 Million Years Old
 
Length 1.85 inches (has  repair) 
 
Despite what has been portrayed in popular movies, Mosasaurs were not dinosaurs, but rather aquatic reptiles. The largest is estimated to reach nearly 50 feet, while others were far more modest in size, measuring between 3- 13 feet.