This video captures the serene underwater world of a lake. The water is a murky green color, and the bottom is covered in brown seaweed. Several fish are swimming around, their bodies varying in shades of brown and gray. The fish are of different sizes and shapes, some with long fins and others with shorter ones. They swim gracefully through the water, occasionally coming close to the camera. The video is shot from a fixed position, and the fish move freely in and out of the frame.