How many fishes have lungs?
A rare species
Throughout the world, there are only 6 species of lungfish—one in South America, one in Australia and four in Africa.
How do fish use lungs?
Can fishes breathe air?
Instead of breathing air, fish must get their oxygen from the water. This process requires large volumes of water to pass through absorption surfaces to get enough oxygen into their bodies using their mouths and gills. These body parts work like a pump to keep water moving over the gas absorption surfaces of the gills.