The video shows a group of fish swimming in a tank. The fish are moving around and interacting with each other. The tank appears to be well-maintained, with clear water and a clean environment. The fish are of different sizes and colors, with some having stripes and others being more solid in color. The fish are swimming in various directions, some are near the surface while others are near the bottom of the tank. The lighting in the tank is bright, allowing for a clear view of the fish and their movements.