Mosasaurus Tooth $30.00A premium fossilized Mosasaur tooth from a powerful marine apex predator that ruled Earths oceans during the Late Cretaceous, roughly 8266 million years ago. Mosasaurs were warm blooded marine reptiles, not dinosaurs, and thrived until the dramatic environmental changes of the KT extinction event reshaped life on Earth. These larger teeth come from more mature individuals and showcase the robust, conical form used to seize prey in ancient seas. Each