The video showcases a vibrant underwater scene in an aquarium. There are several types of fish swimming around, including a blue fish with black stripes, a yellow and black fish, and a large yellow fish with black stripes. The fish are seen swimming in different directions, some near the coral and others in the open water. The coral reef is visible in the background, adding to the colorful display. The water is clear, and the lighting is bright, highlighting the colors of the fish and the coral.