lungfish

Any of several freshwater lobe-finned fishes of the group Dipnoi of Africa, South America, and Australia, having a lunglike organ that enables them to breathe air, especially during drought conditions.

A dipnoan; any fish of the order Dipnoi.

Any fish belonging to the Dipnoi; — so called because they have both lungs and gills.

air–breathing fish, of the class Dipnoi, that have four limblike appendages instead of fins

air-breathing fish having an elongated body and fleshy paired fins; certain species construct mucus-lined mud coverings in which to survive drought