This video shows a koi fish swimming in a tank. The fish is white with orange markings and has large eyes. The tank appears to be in an indoor setting, possibly a pet store or a home aquarium. The lighting is artificial, with blue and purple lights illuminating the water. There are some bubbles rising from an air stone in the tank, and a black cord runs vertically through the water. In the background, blurred figures of people are visible, suggesting the setting is a public place or a home with other people present. The overall mood is calm and serene, focusing on the graceful movement of the fish. There is no discernible text in the video. The time of day and weather are not apparent from the footage.