The video shows a school of fish swimming in clear blue water. The fish are small and silver, with some appearing to be a reddish-brown color. They are tightly packed together, moving in unison as a group. The camera is positioned underwater, looking up at the fish. The lighting suggests it is daytime, and the water is clear, allowing for good visibility of the marine life. There are no other objects or organisms visible in the frame besides the fish and the water.