In the video, a large fish is seen swimming in a river. The fish is dark in color with a long body and fins. It is moving slowly through the water, surrounded by green plants and trees. The water is clear and there are ripples on the surface. The fish appears to be alone in the river, and there are no other fish or animals visible in the video. The sun is shining, and the light reflects off the water's surface, creating a peaceful and serene atmosphere.