Although Utukku is habitable, extreme temperatures and violent weather have discouraged colonization. Because the planet has little liquid water to retain heat, surface temperatures regularly oscillate between 70 C to -60 C. Utukku's vegetation is notable for having evolved flexible central stalks to survive high-speed winds as well as leathery leaves to shrug off the planet's frequent sandstorms. Animal life is mostly confined to the planet's small oceans. Utukku has few valuable minerals.
- Mission: Attican Traverse: Krogan Team
- Mission: Citadel: Krogan Dying Message