As a member of the predator fauna group, Mosasaurus has a body length of about 7 to 8 meters or equivalent to 23 to 26 feet. Mosasaurus is also known to have a strong jaw and long teeth resembling a dagger. In addition, this predator is included in the family of giant sea lizards that have characteristic body parts and tail resembling fins. "Some Mosasaurus have teeth designed to stab prey, while others have teeth for cutting, tearing, or crushing prey," said Dr. Nick Longrich, a paleontologist at the University of Bath.

According to Professor Nathalie Bardet, a paleontology expert at the Muséum National d'Histoire Naturelle Paris, Moroccan phosphate is stored in a shallow and warm epicontinental sea, under the influence of the upwelling system. This zone is formed by deep, cold, and nutrient-rich water currents that rise to the surface, providing food for various marine creatures and, as a result, supporting the survival of many marine predators. This explanation may explain the extraordinary paleobiological diversity observed in Morocco at the end of the Cretaceous Period.