Caerula is an ocean-dominated world, where vast, luminous seas cover most of the surface. The planet orbits a cool star, bathing it in soft blue-tinted light. Its atmosphere is dense and rich in moisture, creating frequent mists and reflective skies. Bioluminescent marine life is widespread, contributing to the planet's characteristic glow.

The Caeluni evolved on Caerula, an ocean-rich planet illuminated by a cool stellar light. Their blue pigmentation is the result of biochemical adaptations that allow them to absorb and reflect specific light frequencies.

Blue skin with subtle chromatic variations, heightened empathic sensitivity, metabolism adapted to aquatic or humid environments.

An advanced and refined species, the Caeluni value balance, knowledge, and a deep connection with the natural environment of their homeworld.