Rrühmastians

Rrühmastians are a sentient species originating from the planet Rrühm, a tidally locked world orbiting a red dwarf star. Their biology is adapted to the extreme conditions of their home, with a thick, leathery hide that protects them from intense radiation on the star-facing side and the extreme cold of the dark side. Rrühmastians possess a unique sensory organ, a bioluminescent crest on their heads, which allows them to communicate through complex patterns of light and color, particularly effective in the dim light of their star.

Their society is structured around communal living in subterranean cities carved into the planet's crust. This provides shelter from both the radiation and the temperature extremes. Rrühmastian culture emphasizes cooperation and a deep respect for their environment, having developed advanced geothermal energy technologies to sustain their civilization. Their primary diet consists of chemotrophic organisms found deep within Rrühm's oceans. Interaction with other species is rare due to their planet's remote location and the specialized adaptations required for survival there, leading to a largely isolationist but intellectually curious populace.