Eastmanosteus is smaller than its great cousin the Dunkleosteus but it had powerful jaws with sharp cutting edges and were likely active predators. It measures 1.50 meters in length but can reach 3 meters. It usually feeds on fish.
He made an appearance in "prehistoric assassins: Blood in ocean" where he is seen devouring a Pteraspis and other unknown fish and being eaten in turn by the Dunkleosteus. He also made an appearance in "Prehistoric Monster reveal".