The video shows a blue fish swimming around a coral reef. The fish is seen swimming in and out of the coral, and at one point, it swims past a clownfish. The coral reef is colorful and vibrant, with various types of coral visible. The blue fish has a sleek body and appears to be healthy. The clownfish is orange with white stripes and is also swimming around the reef. The water is clear, and the lighting is bright, allowing for a good view of the fish and the coral.