Otodus

Otodus is an extinct genus of large prehistoric shark. It existed over a very wide span of time, appearing shortly after the dinosaurs went extinct, about 60 million years ago, and the largest of the group- Megalodon, only dying out just over 2 million years ago. These shark teeth belong to the Moroccan species, Otodus obliquus, which is about 25 million years old. The teeth fossilized in such pristine condition as they were embedded in phosphate rich ocean beds, causing immaculate enamel and serration preservation.