The video shows a large fish with a patterned body and fins swimming in a tank of water. The fish has a long body and a pointed nose, and it moves gracefully through the water. The tank appears to be well-lit, and the water is clear, allowing for a good view of the fish. The fish's movements are slow and deliberate, and it seems to be exploring its surroundings. There are no other fish or objects in the tank, and the background is plain and unobtrusive.