Dunkleosteus is an extinct genus of arthrodire placoderm fish that existed in the Late Devonian, about 380-360 million years ago. It was the largest placoderm and the largest animal in the Devonian. It was 10 meters long and ate everything that moved. It layed eggs like fish, since it was a fish. It became extinct in the Hangenberg event 359 million years ago along with the other placoderms leaving no descendants.