The video shows a fish swimming in a tank. The fish has a yellow body and a long tail. It swims near the bottom of the tank, which is covered in small rocks. There are also some plants in the tank, but they are not the focus of the video. The fish moves slowly and gracefully, and its fins and tail are clearly visible as it swims. The water in the tank is clear, and there are no other fish visible in the video. The lighting in the tank highlights the yellow color of the fish and the texture of the rocks on the bottom.