The video shows a large group of fish swimming together in a school underwater. The fish are moving in a coordinated manner, creating a mesmerizing pattern. The water is a deep blue color, and the fish are silver with hints of blue and green. The school of fish is the main focus of the video, with no other marine life visible in the frame. The fish are of varying sizes, but all appear to be similar species. The video is shot from a distance, allowing for a full view of the school of fish.