The video shows a close-up of a fish swimming around in a coral reef. The fish has a bright yellow body with blue stripes on its sides. The coral reef is made up of various types of coral, including some that resemble long, thin strands. The water is clear, and the lighting is natural, suggesting that the video was taken in a natural underwater environment. The fish moves gracefully through the water, occasionally darting in and out of the coral. The video does not contain any other visible marine life or human activity.