Photorealistic full-body portrait of a young man in casual streetwear. He is standing upright, wearing a transparent backpack filled with crystal-clear water and several small fish swimming inside. The lighting is soft and natural, creating subtle highlights on the water’s surface. The background is an urban setting, slightly blurred to keep the focus on the person and the backpack. High-resolution image with vibrant, rich colors and detailed rendering, giving it the look of an authentic photograph.+ use text