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.
Penguins Barometer for Ocean Health
![Gentoo penguin headshot. (Ron Naveen/ OCEANITES)](https://gdb.voanews.com/FD750C37-9839-4071-80DB-91ADAB89FFD7_w1024_q10_s.jpg)
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Gentoo penguin headshot. (Ron Naveen/ OCEANITES)
![Close up of fish below the Ross Sea. (John B. Weller, Courtesy of The Pew Charitable Trusts)](https://gdb.voanews.com/A2D2EB91-79AA-4930-99B5-A11855268665_w1024_q10_s.jpg)
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Close up of fish below the Ross Sea. (John B. Weller, Courtesy of The Pew Charitable Trusts)
![Close-up of krill. (Photo credit: grandfathered)](https://gdb.voanews.com/115E89E5-13A4-4B58-ADB7-B23E49530ACB_w1024_q10_s.jpg)
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Close-up of krill. (Photo credit: grandfathered)
![Below the Ross Sea. (John B. Weller)](https://gdb.voanews.com/9E654867-5EAD-40CF-8D5A-31A01A0968D3_w1024_q10_s.jpg)
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Below the Ross Sea. (John B. Weller)