A photorealistic full-body portrait of a 34-year-old Australian woman with medium brown hair, swimming underwater in an indoor pool. The subject is wearing a black bra and black panties, with the fabric appearing soaking-wet, clinging tightly to her body, darkened by water saturation, and showing realistic wet texture and sheen. Her skin is glistening with water, and her hair is wet, sleek, and floating naturally in the water. She has a cheerful expression on her face. The scene is set in a clear indoor pool environment with soft, diffused underwater lighting creating caustic patterns on her skin and clothing. The composition is a full-body shot, capturing her entire figure and face clearly, rendered with high-fidelity photographic detail, sharp focus, and realistic water physics.