The video captures a lionfish swimming in the ocean. The fish has a distinctive appearance, with its body covered in white and brown stripes and a fan of long, feathery fins. The lionfish moves gracefully through the water, its fins undulating gently as it navigates the ocean floor. The surrounding water is clear, allowing for a detailed view of the fish and its surroundings. The video provides a close-up look at the lionfish, highlighting its unique features and the beauty of its movements.