Melancholy Merman in an Underwater Abyss AI Image Prompt

Vertical long-shot underwater abyss scene: a slender merman youth sits on the edge of dark rock formations, with an ethereal, aloof temperament, leaning slightly forward to look downward, forlorn. Silver-grey gilded hair drifts in the water, half covering his face; lowered long lashes and melancholic eyes form a quietly emotional focal point. An extremely long glassy fishtail spreads out behind him, extending infinitely toward the bottom and both sides of the frame, like a transparent crystal river running through the image, clearly longer than his body and occupying most of the frame; the scales are crystal clear, with cold blue light and golden flowing streams tracing along the translucent fin membrane. A thin gauze garment softly covers his shoulders and neck, surrounded by dark red flowers, white petals, gold-leaf mineral-pigment patterns, and floating stardust particles. The background is mysterious water currents with no clear boundaries, interweaving black abyss, dark red ripples, blue cold mist, and golden flowing light. Cool-toned premium atmosphere, fusion of CG online-game anime style and gouache hand-painted illustration, with wash/impasto techniques, paper grain, fine particles, gold-thread textures, Rococo maximalist decorative details, hazy misty light, and strong spatial depth.