The video shows a large fish swimming in the water, surrounded by a school of smaller fish. The large fish has a grey body and a white underbelly, and it is swimming slowly through the water. The smaller fish are orange and black, and they are swimming around the large fish, creating a dynamic and lively scene. The water is clear, and the light from above is shining through, illuminating the fish and making their colors stand out. The video captures the beauty and diversity of marine life, showcasing the different species and their interactions with each other.