Dathomiri rock dragons were large reptiles native to the planet Dathomir which possessed rough mottled skin which allowed them to blend in with their surroundings. Being reptiles, the rock dragons were egg layers and cold blooded, which required them to nest around the eggs to keep them warm. Their natural camouflage allowed them to blend in with their environment. Their diet consisted of insects and plants but, when threatened, they could inject a powerful poison from a stinger to protect themselves. This poison was strong enough to kill a fully grown rancor.