A Grizby is a small, Geemer-like creature that dwells in volcanic environments. The Grizby's entire body is encased with a nearly indestructible carapace, fused onto the creature's main body by superheated air. This allows it to be able to survive in superheated environments such as Magmoor Caverns. The shell can withstand any shot, even from the Plasma Beam. Only concussive blasts such as missile explosions can disrupt the barrier. The Grizby is a scavenger and therefore travels in small circles around its nearby area searching for food. They have two large red eyes that help them look for food and threats. The creature is very similar to Geemers, as they can only be killed by missile blasts and travel in a set path. Grizbys have only been featured in Metroid Prime in the Magmoor Caverns of Tallon IV.