A lifelike depiction of a mermaid gliding gracefully through the deep ocean, surrounded by glowing air bubbles, her iridescent tail reflecting light blue hues. The scene is captured in stunning 8K resolution, with a floodlight casting cinematic lighting that dances across the underwater world, illuminating her serene expression and the delicate patterns of her scales. The vertical composition enhances the sense of depth and the majesty of the mermaid's underwater realm.