The video shows a large group of fish swimming in the ocean. The fish are mostly white with some darker colored ones mixed in. They are swimming in a coordinated manner, moving together as a group. The water is clear and blue, and the fish are swimming near a coral reef. The reef is covered in various types of coral and marine plants. The fish are of different sizes, but all appear to be relatively small. The video captures the beauty and diversity of marine life in its natural habitat.