The video shows a group of fish swimming around in an aquarium. The fish are of different colors and sizes, and they are swimming around the tank, which is filled with water and plants. The aquarium is well-lit, and the fish are moving around freely. The plants in the aquarium are green and appear to be healthy. The fish are swimming in different directions, and some are swimming near the surface while others are near the bottom of the tank. The water is clear, and the fish are visible throughout the video.