Dunkleosteus, an extinct type of fish that lived during the Late Devonian period, way before the dinosaurs, about 358 – 382 million years ago.
Its name is a combination of David Dunkle, in honor of him, and the Greek word meaning bone. This is because Dunkleosteus’s teeth are literally bone. It was around 8 meters long, making it one of the largest fish during the Devonian period. Because of its size and no relative competitor, it could eat pretty much anything. There was even evidence of cannibalism among itself. Like all Placoderms, Dunkleosteus was toothless. However, its armored jaw plates formed massive blades that could be used as teeth.
Source: Lorian Flint
