The video shows a close-up of a coral reef in an aquarium. The reef is made up of various types of coral, including brain coral, staghorn coral, and sea anemones. The colors of the coral range from purple and blue to green and pink. The camera pans slowly across the reef, giving viewers a chance to see the different textures and shapes of the coral. There are no fish or other marine animals visible in the video. The water is clear, and the lighting is bright, highlighting the vibrant colors of the coral.