— A family took home a big treasure after a beach day on Saturday.

Harvey Wall found a megalodon shark tooth in the water near the Shallotte Inlet, WECT reported.

“I was surprised [that it was there]. We were looking for seashells and walking our dogs,” Wall said.

The megalodon went extinct millions of years ago and was the largest shark ever documented. The tooth, more than 4 inches long, could be up to almost three million years old.

“I could only see the black part [of the tooth] in low tide. I kicked it and it flipped over, exposing the whole tooth,” said Wall, who wants to donate the tooth to the Museum of Coastal Carolina in Ocean Isle Beach.