This is my portrait of Dilophosaurus wetherilli, a meat-eating theropod dinosaur that hunted in North America 193 million years ago during the Early Jurassic Period. Contrary to certain cinematic portrayals, there is no evidence that Dilophosaurus could spit venom or had an expandable frill. What it did have were powerful jaw muscles that would have helped it kill its prey, which may have included fish and other aquatic organisms as well as other dinosaurs.