The video shows a fish swimming in a tank. The fish is brown in color and has a long body. It is swimming near the bottom of the tank, which is covered in green plants. The fish is moving slowly and gracefully, and there are bubbles visible in the water. The tank appears to be well-maintained, with clear water and no visible debris. The fish seems to be the only living creature in the tank, and there are no other fish or objects visible in the video.