Aetheris Radianta, meaning radiant ether, exhibits ethereal blue-green bioluminescence (450-495 nm). This 10-25 cm tall, 15-50 g bioluminescent plant, in the Photosynthetica Luminescentia cluster, has translucent, ruffled petals forming a rosette with undulating margins and fine veins. Vibrant orange reproductive organs cluster in cup-shaped receptacles at the base, contrasting the cool-toned petals. Its thick, spongy stem supports leaf-like appendages with aquatic undulation, adapted to humid Tropical Cave Systems (0-10°C). Bioluminescence stems from epidermal photoproteins via enzymatic oxidation, attracting nocturnal pollinators like luminescent moths and cave beetles. It occupies a vulnerable niche, supporting cave ecosystems, and belongs to a newly described bioluminescent family adapted morpho-physiologically to subterranean aquatic habitats. Pollination is nocturnal, guided by glowing petals to nectar- and pollen-rich orange structures.