Lungfish are fishes that are able to breathe air. They are descendants of ancient fossils and belong to the Dipnoi Subclass. Lungfish are able to breathe air or to use their gills as any normal fish. They are usually freshwater fishes and can live very long, as the Queensland Lungfish from the Shedd Aquarium of Chicago, part of the permanent collection since 1933. Lungfishes are native to Africa, South America and Australia.