This video features a close-up view of a coral reef in an aquarium. The reef is composed of various types of coral, including brain coral, staghorn coral, and sea anemones. The colors of the coral range from purple to green, and the reef is illuminated by blue lighting, which enhances the vibrancy of the colors. The camera slowly pans across the reef, allowing viewers to observe the intricate details of the coral structures and the symbiotic relationships between the coral and the sea anemones. The water is clear, and there are no visible fish or other marine life in the video. The overall impression is one of a healthy and thriving coral reef ecosystem.