Okay, not underwater, under a rock but I figured those of you that dive and collect, would still be interested.
Man stumbles upon rare 25-million-year-old teeth of mega-toothed shark
Man finds 25-million-year-old teeth belonging to shark twice the size of a great white - CNN
Man stumbles upon rare 25-million-year-old teeth of mega-toothed shark
Man finds 25-million-year-old teeth belonging to shark twice the size of a great white - CNN