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Penguins Barometer for Ocean Health

One barometer of ocean health is the penguin, whose Southern Hemisphere range extends from the tropical Galapagos Islands near the equator to the ice shelf of Antarctica.
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Chinstrap penguin prancing on Prasiola crispa, a terrestrial green algae. (Ron Naveen/ OCEANITES)
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Chinstrap penguin prancing on Prasiola crispa, a terrestrial green algae. (Ron Naveen/ OCEANITES)

Adélie penguin wing spread. (Ron Naveen/ OCEANITES)
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Adélie penguin wing spread. (Ron Naveen/ OCEANITES)

Nesting Adélie penguins, Admiralty Bay. (Ron Naveen/ OCEANITES)
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Nesting Adélie penguins, Admiralty Bay. (Ron Naveen/ OCEANITES)

Penguin swimming, Antarctica. (John B. Weller)
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Penguin swimming, Antarctica. (John B. Weller)

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