(AP) -- David Wentz was snorkeling off Marysville Beach in the St. Clair River last August when what he thought was an odd-looking rock caught his eye. "I didn't know what to think," the 16-year-old Port Huron resident said.
(AP) -- David Wentz was snorkeling off Marysville Beach in the St. Clair River last August when what he thought was an odd-looking rock caught his eye. "I didn't know what to think," the 16-year-old Port Huron resident said.