The video shows a group of yellow fish swimming around in an aquarium. They are seen swimming near rocks and plants. The fish are of different sizes and are seen swimming in different directions. The aquarium is well-lit, and the water is clear. The fish are seen swimming in groups and individually. The rocks and plants are of different colors and sizes. The fish are seen swimming near the bottom of the aquarium, as well as near the top. The video is shot from different angles, providing a view of the fish from all sides.