Mosasaurs were a group of large, predatory marine reptiles that lived during the Late Cretaceous period, approximately 70 to 66 million years ago. They were closely related to modern-day monitor lizards and snakes. Mosasaurs had long, streamlined bodies adapted for life in the water, with powerful jaws and teeth for catching prey.
When it comes to mosasaur skulls and skeletons, they typically had elongated skulls with rows of sharp teeth. Their skeletons were adapted for a marine lifestyle, with streamlined bodies, paddle-like limbs, and a strong tail for propulsion through the water.