The video shows a colorful aquarium with several fish swimming around. The fish are of different sizes and colors, including yellow, blue, and purple. They are swimming in and out of the coral reefs and anemones that are also present in the tank. The coral reefs are in shades of purple and green, and the anemones are a vibrant pink. The water is clear, and the lighting in the tank highlights the colors of the fish and the coral.