The video shows a close-up of an aquarium with several fish swimming around. The fish are small and have a light color, possibly white or pale yellow. They are swimming in and out of the frame, with some fish moving towards the camera and others swimming away. The aquarium is decorated with green plants and has a substrate of small, dark-colored gravel. The water is clear, and the lighting in the aquarium highlights the vibrant colors of the fish and plants.