The video shows a group of fish swimming in the ocean. The fish are of different sizes and colors, with some being darker and others being lighter. They are swimming around a coral reef that is visible in the background. The water is clear, and the light from above is shining through, illuminating the fish and the reef. The fish are moving in different directions, some swimming close to the reef while others are further away. The reef appears to be healthy and is home to various types of marine life.