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 bright green to deep purple, with some coral exhibiting a vibrant orange hue. The reef is teeming with life, with small fish swimming around the coral and anemones swaying gently in the water. The water is clear, allowing for a detailed view of the reef and its inhabitants. The lighting in the aquarium highlights the colors of the coral, making them appear even more vibrant.