Underwater kingdom, Ariel, little mermaid, 17yo, bright red hair, sparkly tail, seashell bra, shiny scales, flowy seaweed, ocean flowers, sitting on a rock, playing with Flounder, Sebastian nearby, coral reef, school of fish, sunlight filtering through the water, soft glow, vibrant colors, cinematic composition, 3/4 view, close-up of Ariel's face, dreamy expression, gentle ripples on the water surface.