Luminarius Spectracapillus, named for its light-emitting spectral cap, is a bioluminescent fungus in the Luminorialis Aurorae cluster, family Mycocaliciaceae, genus Luminarius, order Agaricales. It features translucent, gelatinous caps up to 15 cm tall with wavy margins and small red warts, supported by a semi-translucent stipe. The cap underside has densely packed, radiating pink to orange gills. It emits blue-green bioluminescence (450-495 nm) via a luciferin-luciferase system concentrated in the cap epidermis and gill edges, producing a soft glow. Found in temperate forest understories on lignin- and cellulose-rich decomposing substrates, mainly fallen logs and leaf litter, at 5-25°C. It disperses spores through airborne basidiospores and plays a crucial role in nutrient recycling and mutualistic soil interactions, threatened by deforestation.