Luminarius Aurantius, from Latin 'luminarius' (illuminating) and 'aurantius' (orange), is a bioluminescent fungus of the Pyroglow Ignis cluster, family Omphalotaceae, order Agaricales. It features vibrant orange to golden-yellow funnel-shaped caps with deeply decurrent gills extending down sturdy cylindrical stipes (0–15 cm), with slightly umbonate, moist, smooth pileus and subtly striated stipes showing a color gradient. Bioluminescence occurs in gill and cap tissues, emitting blue-green light (470–530 nm) via luciferin-luciferase enzymatic oxidation. Native to tropical forest floors, it inhabits humid, shaded microhabitats (5–25°C), colonizing decomposing wood and leaf litter. Saprotrophic mycelia decompose organic matter, aiding nutrient cycling. Reproduction occurs via basidiospore dispersal by air currents. Conservation is critical due to habitat loss threatening this ecological decomposer.