I try to add new fossils every day. It weighs in at 1 pound 4.5 ounces. This is a restored megalodon sharks tooth. Megalodon or Carcharodon megalodon was a shark measuring up to 65 feet in length, it is an extinct species of shark that lived around 23 to 2.6 million years ago, during the Early Miocene to the end of the Pliocene.