The video shows a group of red fish swimming in an aquarium. The fish are of various sizes and are seen swimming around the tank, which is filled with water. The aquarium appears to be well-maintained, with clear water and no visible debris. The fish are the main focus of the video, and their movements are the primary action. The lighting in the aquarium highlights the vibrant red color of the fish, making them stand out against the blue background of the water. There are no visible titles, subtitles, or informative text in the video.