The video shows a group of fish swimming around in an aquarium. The fish are of different sizes and colors, including shades of blue, purple, and yellow. They are swimming near the bottom of the tank, which is covered in rocks and pebbles. The water is clear, and the lighting is bright, highlighting the vibrant colors of the fish. The fish are moving in different directions, some swimming in groups while others are alone. The aquarium appears to be well-maintained, with no visible algae or debris.