A fossilized placoderm of a Coccosteus cuspidatus from the Sandwick Fish Beds in Orkney, Scotland. This genus of arthrodiran armored fish was very small compared to its more famous relatives like Dunkleosteus, and was often used to reconstruct these larger genera due to its similar appearances. However, recent revisions in the size estimates of large placoderms suggests that scaling them to Coccosteus is not accurate, and many of its larger relatives are significantly smaller than previously assumed.