Unusual Gift for Fathers - Fossil Megalodon Shark Tooth - as part of the Product Guide series by GeoBeats. This is a tooth from the Megalodon shark. The Megalodon was probably the largest shark to ever live - which makes it the one of the largest predators ever on the world. This particular tooth was found on land in North America in the Southeast United States distributed there from the ancient seas - somewhere between 2 and 20 million years ago. The teeth are all that is left of the megalodon shark because their skeletons were cartilaged - all that remains of them are their teeth. It's a great gift for anyone who is a shark enthusiast or just likes a giant tooth.