Shark Teeth

My aunt and my cousin are visting with my parents so we went today to visit. My cousin likes to go deep sea diving. On one dive they went to someplace called shark tooth ledge or something. Its about 30 miles off the coast of North Carolina. They dove about 90 feet deep - I think that's what he said. He found all of these shark teeth and a rib bone that this petrified. Pretty cool.