Photograph of a person in a pool, full body, in photorealistic style

Photograph of a person in a pool, full body, in photorealistic style. The image should show careful details in the shapes of the hands, head and all parts of the body, with an elegant play of light and shadow that highlights the naturalness of the beach environment. The subject's pose should be natural and relaxed, with a facial expression that conveys tranquility and enjoyment of the surroundings. The background should include typical beach elements such as sand, waves and clear sky, without distracting from the main subject.