The Nometians were an alien species.
Nometians were blue crab-like aliens with some telepathic powers. Their home planet was threatened by an incoming ice planet. The Justice League arrived on the planet to help, and with the Nometians' help, they constructed a gravitation device that cast the planet back to its original orbit. The Nometians were very grateful for that.
- Justice League Episode - "Comfort and Joy"