The video shows a large, yellow fish swimming in a tank. The fish has a long, flowing tail and appears to be the only fish in the tank. The tank is well-lit, with several lights visible on the ceiling. The fish is swimming slowly and gracefully, occasionally turning its body to show different angles. The water in the tank is clear, and there are no other objects or creatures visible. The fish's scales have a shiny, reflective quality, and its fins are spread out as it moves.