The video shows a close-up of two fish swimming in an aquarium. The fish are of different colors, one being gray and the other brown. They are swimming around the tank, which is filled with green plants and gravel. The fish are moving gracefully, and their fins and tails are clearly visible as they swim. The lighting in the tank highlights the colors and textures of the fish and the plants. The aquarium appears to be well-maintained, with clean water and a healthy environment for the fish.