Portrait of an enchanting mermaid surrounded by a swarm of shimmering goldfish amidst a vibrant seascape, where light threads delicately pierce the water's surface. Captured in a cinematic 35mm frame with an F/2.8 aperture, the scene exudes a soft vignette effect, emphasized by a spotlight and cinematic lighting that cast intricate shadows. The composition is richly intricate and graceful, with ornately detailed elements and superlative embellishments. The scene is rendered in stunning 4k resolution, retaining its elegance and ornate sophistication in a 1:2 aspect ratio, conveying a sense of ethereal underwater magic.