The video shows a large aquarium with various colorful 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 reef. The coral reef is vibrant and has different shapes and sizes, providing a habitat for the fish. The fish seem to be healthy and active, and the overall atmosphere of the aquarium is peaceful and calming.