well-developed feathers

" was a theropod dinosaur from the Late Cretaceous

It is believed that it was a bipedal animal

realizing the presence of the dangerous carnivore

Dunkleosteus terrelli Utahraptor well-developed feathersDunkleosteus terrelli was a species of arthrodire placoderm fish that existed in the late Devonian period, from approximately 380 to 360 million years ago, in the Frasnian and Famennian. Unlike previous estimates, recent research has shown that Dunkleosteus terrelli did not reach the enormous dimensions previously attributed to it. Instead of 10 meters in length, this armored fish is now believed to have been of a more moderate size, reaching