The video shows a group of yellow fish with black stripes swimming in a tank. The fish are moving around the tank, and some are seen swimming near the bottom while others are near the top. The tank appears to be filled with water, and there are no other objects or creatures visible in the video. The fish are of varying sizes, but all share the same color pattern. The tank seems to be well-lit, and the water is clear, allowing for a good view of the fish.