The video shows a lionfish swimming in the ocean. The fish has long, flowing fins and a striped body. It moves gracefully through the water, surrounded by rocks and coral. The lionfish's colors blend in with the ocean environment, making it difficult to spot at first glance. The fish's movements are slow and deliberate, and it appears to be exploring its surroundings. The video provides a close-up view of the lionfish, allowing viewers to observe its unique features and behavior.