The video shows a large group of small fish swimming together in a body of water. The fish are all similar in size and color, with a silver-gray hue and small black eyes. They move in unison, creating a mesmerizing pattern as they navigate through the water. The background is a blurred greenish color, likely due to the water's depth and lighting. The fish appear to be in a natural habitat, possibly a lake or ocean, and there are no visible human-made objects or other species of fish in the video.