(8k analog photo), 3d, hyper detailed, monochrome masterful traditional oil painting by James Gilleard , by Qian Xuan , by Jamie Hewlett  , famous artwork inspired by (lucas graciano:1.4) and (john constable:1.1), Deep within the Sunken City, a luminescent orb (sentient jellyfish named Gloom) pulsates with an iridescent glow (soft, pulsing glow). Its ethereal tendrils (drifts and undulates) weave through the water, leaving trails of electric blues (vibrant bioluminescent trails in shades of blue, purple, and green).  Mesmerized denizens (audience, mix of merfolk and other aquatic creatures) peer from coral thrones (coral-encrusted stone benches). The scene is a haunting dreamscape (magical backdrop, half-buried city) teeming with spectral fish (schools of fish darting through the ruins).  Arcane energy (wonder, magic) crackles in the air, as if the water itself hums with forgotten power.
Capture the scene in a lo-fi (old 80's VHS dark fantasy) aesthetic with a VHS glitch effect (grainy, old footage).  Bold, saturated colors define the scene against a dark, textured background (watercolor wash of aged paper).