The video shows a group of fish swimming underwater in a river. The water is clear and the fish are of different sizes and colors. Some fish are red, while others are brown. The fish are swimming near the bottom of the river, which is covered in rocks and pebbles. The fish are moving slowly and gracefully, and the camera captures their movements from different angles. The video provides a close-up view of the fish, allowing the viewer to see their scales and fins in detail. The light from the sun is shining through the water, creating a beautiful and serene atmosphere.