The video shows a group of fish swimming in an aquarium. The fish are of different sizes and colors, including orange, yellow, and green. They are swimming around the tank, some near the bottom and others near the surface. The aquarium is well-lit, and the water is clear, allowing for a good view of the fish. The fish are moving freely, and there are no visible signs of aggression or distress. The tank appears to be well-maintained, with no visible algae or debris. Overall, the video provides a peaceful and calming view of the fish in their environment.