The video shows a large aquarium with various fish swimming around. The fish are of different sizes and colors, and some are swimming near the surface while others are near the bottom. The aquarium is well-lit, and the water is clear, allowing for a good view of the fish. The fish are moving around calmly, and there are no visible signs of aggression or distress. The aquarium appears to be well-maintained, with clean water and no visible debris.