The video shows a large school of small orange fish swimming around a coral reef. The fish are moving in different directions, and the reef is covered in various types of coral. The water is clear, and the lighting is natural, suggesting that the video was taken in a natural underwater environment. The fish appear to be healthy and are of the same species, with bright orange bodies and small fins. The coral reef is diverse, with different shapes and sizes of coral visible. The video does not contain any human activity or artificial objects, and there are no visible signs of pollution or damage to the reef.