Luminaria Crystallinensis, named for its light-emitting and translucent crystal-like features, is a rare, protected bioluminescent fungus endemic to tropical caves. It has delicate, translucent fruiting bodies 5-25 cm tall with broadly fan-shaped, wavy caps and finely radiating gill-like lamellae beneath. Long, slender, semi-transparent stipes anchor clusters to rocky substrates. Emitting 420-490 nm bluish light mainly from gills and stipe bases, it utilizes a luciferin-luciferase system. Likely in Omphalotaceae (order Agaricales), it belongs to the Arboreal Aurantica cluster. As a saprotroph, it decomposes mineral-rich organic matter, cycling nutrients in cave microhabitats. Airborne spores dispersed via erect lamellae enable gene flow. Its mycelium breaks down rocky detritus, supporting ecosystem stability and cool (10-20°C) shaded growth alongside 30 related species.