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Penguins Barometer for Ocean Health
June 06, 2014 3:09 PM
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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Avalanche in the Lemaire Channel. (Ron Naveen/ OCEANITES)
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Pods of killer whales, sometimes 100 strong, patrol the ice edges. Three separate ecotypes live in the Ross Sea, each specializing in a different diet. (John B. Weller)
Penguins Barometer for Ocean Health
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