The video shows a large fish swimming in a tank. The fish has a long body and fins, and it is moving slowly through the water. The tank appears to be well-maintained, with clear water and no visible debris. The fish's movements are smooth and graceful, and it seems to be healthy and well-cared for. The lighting in the tank highlights the fish's features, making it easy to see its size and shape. There are no other fish or objects in the tank, and the focus is solely on the large fish.