The video shows a group of fish swimming around in an aquarium. The fish are of various sizes and colors, and they are swimming in different directions. Some of the fish are swimming near the top of the tank, while others are near the bottom. The aquarium is well-lit, and the water is clear, allowing for a good view of the fish and their surroundings. The fish appear to be healthy and active, and they seem to be enjoying their environment. Overall, the video provides a peaceful and calming view of the fish in their aquarium.