With current known species now totaling well over 500 modern sharks are a fascinating subject.
There is a large global community of shark jaw collectors.
Some of the most sought after and valuable jaws are the Great White Shark, the Mega-mouth Shark, the Frilled Shark, the Cookie Cutter Shark and the elusive Speartooth Shark.
It is a fascinating subject, although you need to be aware of the conservation local protection status of the species you add to your collection. There can be stiff penalties for getting things wrong in this department!
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