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April 2, 2010
April 2, 2010
Ouachita Madtom
Photograph by Joel Sartore
This Month in Photo of the Day: Nature and Environment
The finger-length Ouachita madtom lives only in the Saline River in Arkansas.
—Noturus lachneri
See more photographs from the April 2010 National Geographic feature story "Silent Streams."
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