The video shows a close-up view of a coral reef in an aquarium. The reef is made up of various types of coral, including brain coral and staghorn coral. The colors of the coral range from bright orange to deep purple. The reef is surrounded by water, and there are no fish or other marine animals visible in the video. The camera moves slowly around the reef, allowing viewers to see the intricate details of the coral structures. The lighting in the aquarium highlights the vibrant colors of the coral, making them stand out against the dark background.