The jawbreaker roach replaced its ancestor the bullroach. Its jaw has become a sharp killing machine, capable of easily slicing in half walkerpedes. At the same time, its body has become slightly smaller, and more streamlined. Its eyes have slightly become smaller, and its legs are far more muscular, capable of pushing it to much greater speeds. As it is now, the only reason the walkerpedes survive as a species is that the jawbreaker roaches are usually more concerned with mating contests and cannibalism. They also use their massive jaws to crack open fraboohorns, frabooballs, and igneous stonehorns. As usual, males fight over females by interlocking their jaws until one falls over. Their many air holes have combined into one large air hole on their forehead.