Dunkleosteus and Xiphactinus are the most popular prehistoric fish ever.Xiphactinus live in cretaceous period and had very much sharp teeth for hunt fish,small reptiles and etc.Dunkleosteus live before Xiphactinus that is in Devonian period,it's skull prevent them from injuries and damage and they don;t have teeth,instead they had a bone blade that can cut prey into half
Very informative. Keep up the good work.
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