The video shows a large school of fish swimming in the ocean. The fish are small and silver in color, with long, slender bodies and pointed tails. They are swimming in a coordinated manner, moving in the same direction as a group. The water is clear and blue, and the sunlight is shining through, creating a beautiful underwater scene. The fish are swimming near a coral reef, which is visible in the background. The reef is colorful and appears to be thriving, with various types of coral and marine plants. The fish seem to be swimming in harmony with the reef, creating a peaceful and serene underwater environment.