Ceratodidae

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Ceratodidae (Australian lungfish; subclass Dipneusti, order Ceratodiformes) A monospecific family comprising the Australian lungfish which has a fairly compressed body, with flipper-like pectoral and pelvic fins, and large scales. It occurs in a number of rivers in Australia, mainly south-eastern Queensland. The lung-like swim-bladder can be used to utilize atmospheric oxygen.