A mermaid gracefully swims through the shimmering depths of the ocean, surrounded by a cascade of rising air bubbles. Her iridescent tail glints in the ambient glow of light blue hues, creating a breathtaking contrast against the dark underwater background. The scene is captured in stunning photorealism, with intricate details visible even in the play of light across her scales. Illuminated by a soft, cinematic lighting that casts gentle shadows, the atmosphere is serene and otherworldly. The high-definition, 8K resolution enhances the texture of her skin and the movement of her hair, as the faint floodlight reveals the boundless mystery of the ocean's embrace.