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The class of vertebrates comprising the bony fishes – marine and freshwater fish with a bony skeleton. All have gills covered with a bony operculum, and a layer of thin overlapping bony scales covers the entire body surface. Bony fish have a swim bladder, which acts as a hydrostatic organ enabling the animal to remain suspended in the water at any depth. In some fish this bladder acts as a lung. See also Dipnoi; Teleostei. Compare Chondrichthyes.

Subjects: Biological Sciences — Earth Sciences and Geography.

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