Sunima

Sunima is a fictional exoplanet used in speculative fiction and role-playing games. Placed in a mid-sized star system, Sunima is described as a terrestrial world with diverse biomes and a striking bioluminescent ocean. The planet is commonly depicted with a moderate axial tilt, producing seasons and a pronounced terminator zone that hosts temperate ecologies and human or alien settlements.

Geography and climate vary by author, but most renderings share a coastline architecture of mangrove bays, coral-like reefs, and highland plateaus. The sea glows at night due to bioluminescent plankton and mineral reflections in shallow reefs. The atmosphere is generally portrayed as breathable, though compositions differ between works.

Life and civilizations: Sunima hosts a range of flora and fauna adapted to light-rich skies and twilight zones. Luminescent forests, glowfish-like marine life, and migratory avifauna are common elements. In several continuities, intelligent societies emerge in the terminator belt or along coastal river networks, often drawing on solar and tidal resources.

Cultural impact and use: The world serves as a setting seed for novels, games, and art, with recurring motifs of exploration, environmental gradients, and bioluminescent ecosystems. Some works embed Sunima within a shared universe that includes related planets and star systems, while others treat it as a standalone setting.

See also: List of fictional planets, Exoplanet in fiction, Bioluminescence in fiction.