A glacial-urchin jellyfish with crystalline spine canopy emitting soft aurora borealis glow, its bell-shaped body of translucent frosted glass revealing pulsing bioluminescent core organs, floating through an arctic undersea canyon where ancient frozen kelp forests sway and aurora light filters through ice-shelf ceiling, scientific field notes cross-section mapping buoyancy bladder systems and cold-resistant neural networks, palette of glacial ice cyan, phosphorescent violet, pale aurora green and deep polar navy, Victorian natural history arctic expedition illustration aesthetic