The video captures a large group of fish swimming in a tank. The fish are predominantly yellow and white, with some having blue and black stripes. They are of various sizes and shapes, with some having elongated bodies and others being more rounded. The fish are swimming in different directions, creating a dynamic and lively scene. The water is clear, allowing for a good view of the fish and their movements. There are no visible titles, subtitles, or informative text in the video.