The video shows a large fish swimming in the ocean. The fish is grey in color and has a long tail. It is swimming in front of a school of small fish that are swimming in the background. The water is clear and blue, and the sunlight is shining through it. The large fish is moving slowly and gracefully, and its fins are moving gently. The small fish in the background are swimming in a tight group, and their silver bodies shimmer in the sunlight. The video captures the beauty and tranquility of the underwater world.