The video shows a fish tank with several fish swimming around. The fish are of different colors and sizes, and they are swimming in different directions. The tank is filled with water, and there are plants and rocks inside. The fish are moving around the tank, and some are swimming near the surface while others are near the bottom. The lighting in the tank is bright, and the water is clear. The fish are healthy and active, and they are interacting with each other and their environment.