The video shows a colorful fish swimming in a blue aquarium. The fish has a red tail and fins, and a blue body. It swims from left to right, and as it moves, it leaves behind a trail of bubbles. The aquarium is well-lit, and the water is clear, allowing for a good view of the fish and its surroundings. The fish appears to be healthy and active, and there are no other fish or objects in the aquarium. The video is shot from a side angle, giving a clear view of the fish's movements and the bubbles it leaves behind.