The video shows a large fish swimming underwater in a body of water. The water is clear, and the fish is the only visible creature in the video. The fish is swimming in a calm and steady manner, and there are no other objects or creatures in the video. The fish appears to be a type of large fish, possibly a bass or a catfish, but it is difficult to determine the exact species from the video alone. The water is a clear blue color, and the fish is a darker shade of blue or black. The fish moves smoothly through the water, and there are no sudden movements or changes in direction. The video does not show any other significant action or event.