A photorealistic mermaid gracefully swims through the deep ocean, surrounded by shimmering air bubbles. The scene is washed in a light blue hue, enhanced by cinematic and ethereal lighting that creates a serene, dreamlike atmosphere. The mermaid's iridescent scales glisten under the floodlight, casting gentle reflections across her flowing hair. Her expressive eyes convey a sense of wonder as she navigates a world both mysterious and beautiful. The composition captures a vertical aspect ratio, drawing attention to the vastness of her underwater realm.