The video shows a yellow fish swimming in a tank with various coral and rocks. The fish is seen swimming around and exploring the tank, occasionally coming close to the camera. The tank is decorated with different types of coral, including purple and pink sponges, and a green sea urchin. The fish appears to be healthy and active, moving smoothly through the water. The tank itself is well-maintained, with clear water and no visible debris. Overall, the video provides a glimpse into the life of a yellow fish in a colorful and vibrant aquatic environment.