The video shows a fish tank with several fish swimming around. The fish are of different sizes and colors, including yellow, blue, and black. The tank is well-lit, and the water is clear. The fish are swimming around the tank, some near the top and others near the bottom. There are rocks and plants in the tank, providing a natural habitat for the fish. The fish are moving in different directions, some swimming in groups while others are alone. The video captures the peaceful movement of the fish in their environment.