This video showcases a group of fish swimming in an aquarium. The fish are of different sizes and colors, with some having yellow and green scales, while others have blue and purple hues. They are seen swimming around the tank, occasionally brushing against each other. The aquarium appears to be well-maintained, with clear water and no visible debris. The fish seem to be healthy and active, moving around freely. The lighting in the aquarium highlights the vibrant colors of the fish, making them stand out against the dark background.