Definition of Australian lungfish
: a large, olive green to dull brown lungfish (Neoceratodus forsteri synonym Ceratodus forsteri) of Australian rivers that attains a length of up to 5 feet (1.5 meters) An Australian lungfish is the world's oldest fish in an aquarium, at more than 80 years old. — Kate Lucas, Orange County Register (California), 5 July 2009 Australian lungfish can stay completely underwater because they take in lots of oxygen through their skin. — Hedda Nussbaum, Ranger Rick, November 1984 —called also barramunda, Burnett salmon, Queensland lungfish, salmon
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