Ariel from Disney's The Little Mermaid, 17 years old, depicted in a dynamic swimming pose under the sea. The scene captures her vibrant red hair flowing behind her, her mermaid tail gracefully slicing through the water. The background showcases a stunning undersea world filled with colorful coral reefs and shimmering schools of fish. Ariel's expression is curious and adventurous, embodying her youthful spirit. The image is rendered in high quality, 16k resolution, bringing every detail to life with vivid clarity. The composition is carefully framed, ensuring that Ariel's features are proportional and realistic, with attention to her iconic Disney style. The art avoids any distortions, maintaining a natural and appealing appearance true to her character's essence. The underwater lighting casts enchanting highlights and shadows, enhancing the overall mood of the scene.