The gargan rockroach is a non-sentient creature that has long, spindly legs, and looks like a cross between a slug, cricket, and beetle. They emit a hypnotic spray that slows down and pacifies the non-humanoid creatures in its pit. Their mouth looks like a human's pursed lips and has many mandibles surrounding its mouth. They have an almost impenetrable exoskeleton and are very large. They have two main eyes and two smaller eyes below those. The rockroach is one of, if not the, most powerful monsters in Skree. This is because of their tough armor, hypnotic gas, and other monsters not yet eaten. They often prey on horned hounds, quill diggles, cave blats, humans, and even toothy cows.