The video shows a group of purple fish swimming in a tank. The fish are moving around the tank, and the water is clear. The tank appears to be well-maintained, with no visible debris or algae. The fish are of various sizes, but all share the same vibrant purple color. The tank is illuminated by a light source that casts a soft glow on the fish, highlighting their movements. The fish seem to be healthy and active, swimming around the tank with ease.