Thornosaurs are a fictional species that appears in the Goop series. They come in a variety of shapes, sizes, and colors, although they mostly are yellow, orange, light brown, or red. The main antagonist of the franchise (King Grex) is a Thornosaur, and one of the protagonists (Tawnya) is half-Gooptar.
Thornosaurs are a species of dinosaur. They generally grow to a little over five feet tall. They have spikes on their heads that can form different shapes, similar to a Gooptar's crest. Thornosaurs have clawed hands with four fingers and clawed feet with three toes. Thornosaurs have long tails with spikes on the tip.