Portrait of a stunning mermaid with flowing, opulent hair, surrounded by a shimmering school of tiny goldfish amidst a backdrop of vibrant marine life. The dim light filters delicately through the depths, casting a cinematic ambiance, shot on 35mm, F/2.8, with a subtle vignette in ultra-high-definition 4k. A gentle spotlight accentuates the scene with cinematic lighting, creating an exquisitely detailed and intricate composition. The result is an elegant, ornate masterpiece that is super detailed, maintaining the allure and mystery of the underwater world, aspect ratio 1:2, quality setting 2.