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How do fish breathe?
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Respiratory system of a fish Diagram showing a teleost fish, specifically a perch, with a side view and a labeled cross section. The cross section identifies internal structures including muscle, vertebra, neural spine, nerve cord, dorsal aorta, dorsal and ventral ribs, swim bladder, coelom, and stomach. The side view shows the location of the swim bladder and stomach inside the fish. South American lungfish Electric eel
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Respiratory system of a fish
Simplified diagram of a fish's respiratory system, showing the location of the gills...
Encyclopædia Britannica, Inc.
Swim bladder
Cross section of a teleost fish showing the swim bladder—a gas-filled organ that...
Encyclopædia Britannica, Inc.
South American lungfish
A primitive air-breathing fish, the South American lungfish (Lepidosiren paradoxa),...
Encyclopædia Britannica, Inc.
Electric eel
A freshwater fish capable of generating strong electric shocks, the electric eel...
Steven G. Johnson