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 rocks and plants in the tank. The aquarium is well-lit, and the water is clear, allowing for a good view of the fish and their surroundings. The fish are moving around calmly, and there is no sign of any aggression or distress among them. The tank appears to be well-maintained, with clean water and a healthy environment for the fish.