| image = Australian-Lungfish.jpg | image_width = 250px | image_caption = Queensland Lungfish | regnum = Animalia | phylum = Chordata | subphylum = Vertebrata | classis = Sarcopterygii | subclassis = Dipnoi | subclassis_authority = Müller, 1844 | subdivision_ranks = Orders | subdivision = See text. }} Lungfish (also known as salamanderfish) are freshwater fish belonging to the Subclass Dipnoi. Lungfish are best-known for retaining characteristics primitive within the Osteichthyes, includin… (More on Dipnomorpha)