Lungfish meaning

lŭngfĭsh
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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.
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Any of two orders (Ceratodiformes and Lepidosireniformes) of lobefins having lungs as well as gills.
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Any of several tropical freshwater fish of the order or subclass Dipnoi that, in addition to having gills, have lunglike organs for breathing air. Lungfish have a long, narrow body, and certain species can survive periods of drought inside a mucus-lined cocoon in the mud. The lungfish and the coelacanths are the only living lobe-finned fishes.
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Air-breathing fish, of the class Dipnoi, that have four limblike appendages instead of fins.
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