The video shows a close-up of a fish swimming in a tank. The fish is brown and has a long tail. It is swimming near the bottom of the tank, which is covered in sand. The water in the tank is clear, and the fish is the only visible creature in the video. The fish moves slowly and gracefully, its fins undulating as it navigates the tank. The lighting in the tank is bright, casting a glow on the fish and the sandy bottom. The video does not contain any other objects or creatures, and the focus remains solely on the fish and its movements.