The video shows a large aquarium with a variety of colorful fish swimming around. The fish are of different sizes and colors, including yellow, blue, and red. The aquarium is well-lit, and the water is clear, allowing for a good view of the fish and the coral reefs. The fish are seen swimming in different directions, some near the surface and others near the bottom of the tank. The coral reefs are vibrant and add to the overall beauty of the scene.