It poops (cleans) out the sand, and these guys are mainly nocturnal (they will hide in the rocks once they find a cave). So if you find a bunch of small 'pellet' size sand clumps - that's the end product.
It poops (cleans) out the sand, and these guys are mainly nocturnal (they will hide in the rocks once they find a cave). So if you find a bunch of small 'pellet' size sand clumps - that's the end product.