The video shows a group of fish swimming in a tank. The fish are of different sizes and colors, and they are moving around the tank in a lively manner. The tank appears to be well-maintained, with clear water and a clean bottom. 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, which makes the colors of the fish stand out. There are no visible plants or decorations in the tank, which gives it a minimalist look. The fish seem to be healthy and active, and there is no sign of any aggressive behavior among them. Overall, the video captures a peaceful scene of fish swimming in a tank.