The video shows a fish tank with various fish swimming around. The fish are of different sizes and colors, including blue, yellow, and black. They are swimming in and out of the coral and rocks in the tank. The tank is well-lit, and the water is clear. The fish are moving smoothly, and there is no visible aggression or stress among them. The coral and rocks in the tank are of different shapes and sizes, adding to the diversity of the scene. The fish seem to be healthy and well-cared for.