A photorealistic mermaid gracefully swims through the depths of the ocean, surrounded by shimmering air bubbles, her tail glistening in shades of iridescent blue and green. The scene is illuminated by cinematic lighting, casting a floodlight effect that enhances the ethereal glow of the ocean's surface above. Her flowing hair dances in the water, reflecting light blue hues, as she glides effortlessly through the serene underwater landscape, creating a captivating and otherworldly atmosphere, in an 8K resolution, showcasing the majesty of the marine world.