Luminoris splendidum, from Latin 'luminoris' (of light) and 'splendidum' (brilliant), is a bioluminescent fungus in the Arboreal Aurantica cluster, family Mycenaceae, genus Luminoris, order Agaricales. It features translucent gelatinous fruiting bodies (10-25 cm) with undulating, semi-transparent caps colored soft peach to mild lavender, bearing luminescent granules and smooth, gill-less hymenophores emitting blue-green light (450-495 nm). Slender, flexible stipes support caps that sway gently. Found in temperate forests (5-20°C), it saprotrophically decomposes lignin-rich substrates, contributing to nutrient cycling. Bioluminescence likely results from a luciferin-luciferase reaction localized in the hymenial layer and hyphal tips. Spore dispersal is passive via wind, aided by elevated fruiting bodies. Its extensive mycelium promotes forest health, maintaining a stable rare status within its ecological niche.