http://www.arizonaskiesmeteorites.co...n_Tooth_11.jpg

tooth

http://www.fossilien.de/seiten/haiza...weisserhai.jpg

comparison (megalodon, great white and diver)

http://www.wmnh.com/carchs.jpg
megalodon jaw


it's said to be extinct so no need to worry (i say 'said' because no one's seen one, although, the ocean is huge and we still find new things everyday there, so there could still be a cuople hiding somehwere)