(Somewhere in the Tetra Galaxy)
Greater Ithraks are a species of aggressive predators which evolved somewhere within the Tetra Galaxy, although the exact location is unknown. The only location they have been documented in thus far is the Celestial Archives, where they very likely did not evolve within. They are obviously related to the Lesser Ithraks, and are considered a cousin species.
Due to their impenetrable hide, they are invulnerable to damage from their front whilst they move about on the ground, yet for some reason this invulnerability is lost when they choose to cling to a wall. Despite this immense defensive ability, their tail is considerably easier to damage, and this is thereby considered their weak point.
- Metroid Prime: Hunters (First appearance)