noun (plural same or lungfishes)
An elongated freshwater fish with one or two sacs that function as lungs, enabling it to breathe air. It lives in poorly oxygenated water and can estivate in mud for long periods to survive drought.
- Subclass Dipnoi: families Ceratodontidae (one Australian species), Lepidosirenidae (one South American species), and Protopteridae (four African species)
- The data set included sequences of genes from mammals, birds, amphibians, coelacanths, lungfishes, ray-finned fishes, and cartilaginous fishes.
- The ray-fins include the thousands of familiar sport and commercial fishes, but of the lobe-fins, only eight species survive, six lungfishes and two coelacanths.
- Tiktaalik would have breathed like a lungfish, says Clack, senior assistant curator at Cambridge's University Museum of Zoology.
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