The razor-sharp, 5ins peg – believed to be from one of the largest predators in history, a megalodon shark – was washed up in North Myrtle Beach by Hurricane Matthew.
The ancient sea monster was thought to have gone extinct more than 2.5million years ago.
But video evidence has suggested the giant jaws may still stalk the depths of the ocean.
He ruled out it being from a great white shark.
Mr Pierce said: “Great whites only get up to about three inches.”
Experts think that cataclysmic winds are sea conditions from Hurricane Matthew blew the shark tooth inland.
It’s not the only thing a hurricane has brought in.
And a giant fish was caught earlier this week and astonished fishermen.