The video shows a group of fish swimming in a tank. The fish are of different colors and sizes, and they are swimming around the tank in different directions. The tank appears to be well-lit, and the water is clear. The fish are moving in a lively manner, and they seem to be enjoying their environment. The tank is decorated with plants and rocks, and the fish are swimming near the surface as well as deeper in the water. The video captures the beauty and diversity of the fish, and it provides a calming and peaceful viewing experience.