Sinraptor was a large theropod from the Jurassic. At 23-26 feet long and around 1-2 tons, it's a medium sized carnivore. Sinraptor was a relative of the more famous Allosaurus. Sinraptor was likely one of the alpha predators in it's environment. Like other allosaurs, Sinraptor could have hunted in packs to bring down larger game. Sinraptor lived in Asia around 150 million years ago.