The video shows a large aquarium with several fish swimming around. The fish are of different sizes and colors, and they are swimming in different directions. The aquarium is well-lit, and the water is clear, allowing for a good view of the fish and the coral reefs. The coral reefs are of various shapes and sizes, and they are located at different levels in the aquarium. The fish are swimming near the top, middle, and bottom of the aquarium. The video is shot from the outside of the aquarium, and the camera moves slowly to capture the different parts of the aquarium.