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Kralees are a species of non-sapient, beetle-like organism native to either Aether or Dark Aether, but can open transdimensional portals through the use of the crystal on its back to shift it between the two worlds. To do this, the crystal harnesses energy used to fuel the creation of a warp portal. This is a defensive mechanism; however, it cannot control this process, and it thus spends its time in perpetual state of dimensional flux. They are not exclusive to one particular area but seem mostly confined to the Agon Wastes. Dark Visors make them much easier to locate.
Its future seems bleak, as its powerful defensive measure has been cut short thanks to the collapse of Dark Aether. It therefore may soon go extinct.
- Metroid Prime 2: Echoes (First appearance)