Cetrens

Cetrens are a fictional species originating from the planet Xylos in the Andromeda galaxy. They are known for their unique physiological adaptations to their homeworld's harsh environment, characterized by extreme temperature fluctuations and a methane-rich atmosphere. Physically, cetrens are bipedal, standing approximately 1.8 meters tall, with a thick, leathery hide that provides insulation and protection. Their coloration varies from deep blues to earthy browns, often serving as camouflage within Xylos's varied terrains.

A defining characteristic of cetrens is their advanced bio-luminescent system. Patches of specialized cells across their bodies can emit light, which they use for communication, signaling mood, and navigating the dark periods of Xylos's long rotation. Their eyes are large and multifaceted, capable of perceiving a broader spectrum of light than most known species, allowing them to see clearly in low-light conditions.

Cetrens possess a complex societal structure centered around communal living and a deep respect for their planet's ecosystem. Their technology, while advanced, is largely bio-integrated, focusing on sustainable energy sources and organic engineering. They are known to be a peaceful and introspective species, dedicating much of their time to philosophical study and artistic expression. Their interactions with other species are typically cautious but driven by a desire for understanding and mutual growth.