The subteroth was a bipedal non-sentient species native to Makeb. Subteroths typically lived in deep underground caverns, hunted using scent and the crest on the back of their head, a hypersensitive organ that picks up the electromagnetic fields of a prey’s heartbeat and transmits it directly to the their nervous system. When their native planet was invaded by the Hutt Cartel in in 3639 BBY the subsequent the over-mining of Isotope-5 caused ground-quakes that driven the Subteroths out of their normal hunting grounds and toward the surface.