Ethereal underwater fine-art photograph of a translucent golden jellyfish drifting gracefully, bell softly illuminated with delicate internal gradients, long flowing tentacles trailing downward in gentle motion, organic and serene composition centered in frame, dreamy aquatic atmosphere, soft particulate texture in the water, muted pastel green background with subtle vignette, natural bioluminescent glow effect, high-end nature editorial aesthetic, calm and meditative mood, shot on Nikon D850 with AF-S Micro NIKKOR 105mm f/2.8G, aperture f/5.6 for balanced sharpness and depth, 1/250s shutter speed to freeze motion, ISO 400, underwater strobe lighting diffused through soft panels to create even illumination and smooth tonal transitions, ultra-photorealistic detail, natural color rendition, minimal retouching, subtle fine-art grain.