A large school of small fish swims actively in dark water. Many of the fish are orange or red, while others are silver or grey, and some show a combination of these colors. The fish are seen congregating in groups, darting around, and occasionally surfacing. The water appears dark, suggesting a pond or a large outdoor water container. Natural light illuminates the scene, indicating it is daytime. A small amount of green foliage is visible at the bottom left of the frame. There are no people or visible text in the video.