Dunkleosteus was a twenty-foot placoderm that lived in the late Devonian Period. It was the top predator. The name can be pronounced dunk-ull-AH-stee-us or dunk-lee-OH-stee-us or
It ate everything from small fish to its own species.
Like all placoderms, Dunkleosteus had its whole entire head covered in plates of armor. It had huge teeth that were probably somewhere around 3". Even its eyeballs were covered in armor. All that remains of Dunkleosteus is its head armor.