A mesmerizing magical underwater fantasy scene set during a golden sunset. A large, graceful fish constructed entirely from glowing geometric wireframe lines swims just beneath the ocean surface, its body radiating soft neon blue and violet light with embedded star-like sparkles that trail gently behind it. Smaller bioluminescent fish shimmer nearby, adding to the ethereal glow. Above the rippling waterline, a radiant sun sinks toward the horizon, casting warm golden rays through pastel clouds in a twilight sky of oranges, pinks, and purples. Below, a deep-sea coral reef landscape fades into mysterious darkness, subtly illuminated by drifting starlight particles. The entire composition exudes a dreamlike, cosmic underwater atmosphere with vibrant blues and purples, rendered in ultra-detailed digital illustration style with cinematic lighting and fantasy concept art flair.