Sand Shark or Otodus obliquus – (the Great Grandfather of the Megalodon) is one of the earliest mackerel sharks. These teeth are noted for their wide triangular crown and large side cusps (occasionally multiple side cusps). The Otodus obliquus was the king of the early Eocene, approximately 50-55 million years ago. These large teeth are very showy, making them a must have for every fossil shark teeth collection. Large Otodus obliquus teeth are not easily located in the phosphate pits in Atlas Mountains of Morocco, but can still be affordable.