Stock Photo Description: The Whorl Tooth Shark or Helicoprion was a very unusual Permian shark that flourished in the Permian oceans 248 to 280 million years ago. The Helicoprion's tooth whorl, was a coiled, and tooth-studded extension of the lower jaw. Helicoprion reaching about ten feet in length, an they may have used the tooth spiral to disable its prey while hunting.
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