The video shows a group of fish swimming in an aquarium. The fish are of different sizes and colors, including shades of orange, black, and white. They are swimming around the tank, which is filled with green plants and rocks. The water is clear, and the lighting is bright, highlighting the vibrant colors of the fish and the plants. The fish are moving in different directions, some swimming near the surface while others are closer to the bottom of the tank. The aquarium appears to be well-maintained and clean.