The acrocanthosaurus, of the theropods family, was a large bipedal predator that can measure up to 12 meters long and weighs 7.2 tons. His name means "high thorns", he comes from the spines ending his vertebrae. It is assumed that they allowed long chains of muscle to be attached to the back, hips, and predator's neck. He also had a long and powerful tail that allowed him to counterbalance the head and body as well as small forelimbs ideal for capturing and holding prey during the hunt.