Ariel, the beautiful mermaid, and Sebastian the Fish are surrounded by a vibrant underwater atmosphere. Ariel is sitting on a rock, holding a book in her hands, while Sebastian is at her side, gazing up at her attentively. With the sun beaming down from the surface above, their pastel-colored bodies seem to be illuminated by the light and dancing shadows created around them. To achieve a soft, delicate look, try giving Ariel and Sebastian warm, light pastel hues and silver accents. For the background, use blues and greens in different shades, blending them up towards the surface of the ocean to give the illusion of depth and movement. Finally, add in touches of sparkle and shine to bring out the beauty of the sea.