Dunkleosteus hunting primitive sharks, illustration
Illustration of Dunkleosteus sp., an armoured fish (placoderm) that lived during the Devonian period. It was an apex predator that hunted other sharks. The largest species of Dunkleosteus, Dunkleosteus terri, grew up to 9 metres. , by JOSE ANTONIO PENAS/SCIENCE PHOTO LIBRARY
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