The video shows a colorful fish swimming in an aquarium. The fish has yellow and blue stripes on its body and a yellow tail. It is swimming around the tank, which is filled with various corals and plants. The fish appears to be healthy and active, moving smoothly through the water. The aquarium is well-lit, highlighting the vibrant colors of the fish and the corals. The water is clear, and there are no other fish visible in the tank. The video captures the peaceful and serene environment of the aquarium, with the fish being the main focus.