Portrait of a captivating mermaid with flowing, opulent hair, surrounded by delicate goldfish weaving through the underwater tapestry of vibrant marine life. The water's surface casts a gentle, soft-focused glow that subtly illuminates the scene, reminiscent of cinematic lighting. Captured with the elegance and detail of a 35mm lens at F/2.8, the composition features an intricate symmetry with a beautifully blurred vignette effect, highlighting the mermaid's graceful features. The atmosphere is rendered in stunning 4k resolution, enhancing the ornate and detailed underwater environment, creating a sense of serenity and mystery.