Aetherocapillus Lucidum, named from Latin 'aether' (bright sky) and 'capillus' (filament), is a bioluminescent fungus with a smooth, convex cap (10-30 cm) and filamentous gills. Its robust, granular stipe supports the cap and shows growth-based movement. The fruiting body’s translucent, gelatinous surface emits blue-green bioluminescence (450-495 nm) via a luciferin-luciferase system localized in cap and stipe, likely attracting nocturnal insects for spore dispersal. Native to tropical forest floors, it thrives on decomposing leaf litter and wood at 5–25°C in humid, shaded habitats. Taxonomically, it belongs to Mycenaceae, genus Aetherocapillus, order Agaricales, within the uncommon Aetherium Arborescens cluster of 10 species. Its saprotrophic mycelia play a vital role in nutrient cycling and forest ecosystem health.