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An emperor #penguin dives into the frigid Antarctic water. Emperors can dive as deep as 1,800 feet (550 meters) on a single breath of air that can last up to 20 minutes. Emperor penguin studies is just one example of the many research projects supported by the NSF's U.S. Antarctic Program. [Photo credit: Glenn Grant, NSF]

The Paraliparis Devriesi, named after researcher Arthur DeVries of the University of Illinois, an American #biologist who has studied Antarctic fish for 40 years. His research focuses on proteins developed by Antarctic fish that act as antifreeze, allowing them to live in the frigid, freezing waters of the Southern Ocean. [Photo credit: Melanie Conner, NSF]

A group of Adelie #penguins swim along the water by porpoising in McMurdo Sound, Antarctica. [Photo credit: Peter Rejcek, NSF]

A fluorescent coral under fluorescent lighting conditions. [Photo credit: Justin Marshall, University of Queensland]

A female mantis #shrimp (Pseudosquillana richeri). Mantis shrimp are an ancient group of marine predators only distantly related to other more familiar crustaceans, such as shrimp and lobsters. [Photo credit: Roy L. Caldwell, Department of Integrative Biology, University of California, Berkeley]