Cactus first appears attempting to hunt down an adult bull Stegosaurus named Farallon and his son, Kula. Cactus scares away the two Stegosaurus, separating the two. Later, shortly after Farallon and Kula reunite, Cactus and an unnamed Allosaurus both attempt to hunt down the father and son again. Kula and Farallon are able to escape, leaving the two predators to it fight out. Cactus is able to defeat the Allosaurus while the Stegosaurus leave the predators behind.