A dark fantasy scene: A very pretty blonde Siren mermaid is playing her small harp with innocent expression on a reef in a rough waters. Nearby her, remains of shipwreck could be seen. Dark Comedy, Overcast, Mystical, Ambient Occlusion, Desaturated, Achromatic, (best quality, masterpiece, photorealistic), very aesthetic, perfect composition, intricate details, ultra-detailed, vivid colors.