A luminous star-crab with a carapace mapping visible and invisible galaxies, skuttling across a bioluminescent coral reef at deep ocean midnight where vampire squid lanterns drift through crystalline waters, scientific field notes cross-section mapping celestial navigation eye clusters and pressure-resistant exoskeleton chitin layers, palette of deep abyss indigo, bioluminescent cyan, galactic purple and pale starlight silver, Victorian natural history marine astronomical expedition illustration aesthetic