Luminoth
From Metroid Wiki
The Luminoth, like the Chozo, are a remarkably advanced race. They are moth-like beings who have an immense social and spiritual centralization with light. They are the last of the known Higher races, as both the Chozo and Alimbics are now likely extinct, the former assumed to have nothing more than an ethereal state of being in the world, the other being destroyed by Gorea with horrifying speed and are nothing more than essences now as well.