The video shows a group of small fish swimming around in a tank. The fish are mostly silver in color, with some having orange and black stripes. They are swimming around a rock formation that is in the center of the tank. The water is clear, and there are bubbles visible in the background. The fish are moving in different directions, some swimming near the top of the tank while others are closer to the bottom. The rock formation has a rough texture and is brown in color.