Cilix is a moon that orbits the planet Cogrion. It is primarily made of rock and has an ice crust. It has a very thin Type IV atmosphere, composed primarily of oxygen. Its surface is striated by cracks and streaks, but craters are relatively few. A water ocean exists beneath the surface ice, which does harbor native flora and fauna. Heat from tidal flexing causes the ocean to remain liquid and drives ice movement similar to plate tectonics.