The video shows a close-up of a fish tank with water flowing through it. The water is clear and there are small bubbles visible. The tank appears to be well-maintained and clean. The fish inside the tank are swimming around and interacting with each other. The fish are of different sizes and colors, and they are moving in various directions. The lighting in the tank is bright, making the colors of the fish and the plants in the tank stand out. The plants are green and appear to be healthy. The fish are active and seem to be enjoying their environment.