Kilaakians, a.k.a. Kilaaks, are a sapient species from the world of Kilaak; a planetoid located between Mars and Jupiter. Their natural form is small and mineral-like, but they are able to assume a humanoid female appearance.
The aliens seem to require high temperatures to function (which is strange, considering their world of origin). Exposure to cold temperature harms them and causes them to revert to their original forms.
- Destroy All Monsters (1968)