Located on the right side of the fish. Grouper is a mammal that breathes with its lungs. The lung is located on the right side of the fish and is connected with the heart and liver of the fish. The lung of grouper is divided into two parts, and the left and right lobes are connected to form a whole. Grouper belongs to Lupinidae, Perciformes and Epinephelus, with at least 60 species, commonly known as grouper, also known as fish, which is a rare warm-water fish in the offshore.