The video shows a group of fish swimming in an aquarium. The fish are of different colors, including red, yellow, and orange. They are seen swimming around the tank, which is decorated with plants and rocks. The water is clear, and the lighting is bright, highlighting the vibrant colors of the fish. The fish are of different sizes and shapes, some with long fins and others with shorter ones. They move gracefully through the water, sometimes swimming in groups and other times alone. The aquarium appears to be well-maintained, with clean water and healthy-looking fish.