The Vietnamese lungfish was a cryptidlobe-finned fish reported from Vietnam. Roy P. Mackal collected "excellent first-hand anecdotal reports" indicating the existence of a very large, 6 ft (1.8 m) long species of lungfish (order Dipnoi) in that country.[1][2] The known lungfishes are found only in South America, Africa, and Australia.[3] The marbled lungfish (Protopterus aethiopicus) of Africa's Nilotic wetlands may grow to a similar size as the alleged Vietnamese species, as the largest recorded specimen was around 6 ft (1.8 m) in length.[4]
