The video shows a fish swimming in a tank with a green background. The fish is seen swimming around the tank, and the camera follows its movements. The fish appears to be a type of freshwater fish, possibly a bass or a similar species. The tank is well-lit, and the water is clear, allowing for a good view of the fish and its surroundings. The fish moves gracefully, and its scales reflect the light, giving it a shiny appearance. The green background of the tank is likely artificial, and it provides a nice contrast to the fish's color. Overall, the video captures the beauty and tranquility of the fish in its environment.