The video shows a large fish swimming in a tank of water. The fish is moving around the tank, and the water is clear. The fish appears to be healthy and is the only visible creature in the tank. The tank is well-lit, and the water is clean. The fish is swimming near the surface of the water, and its movements are smooth and graceful. The tank seems to be in a well-maintained environment, and the fish appears to be well-cared for.