The video shows a group of small fish swimming in a tank. The fish are brightly colored and are seen swimming around the tank. The tank is filled with green plants and rocks, creating a natural habitat for the fish. The water is clear, allowing for a good view of the fish and their surroundings. The fish move gracefully, darting in and out of the plants and rocks. The lighting in the tank highlights the vibrant colors of the fish and the greenery of the plants.