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Wednesday, November 11, 2009

Photo: Sex-Changing Chemicals Found in Potomac River


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Smallmouth bass, like the one shown above, are one of many fish species whose males are demonstrating distinctly feminine behavior. Male smallmouth bass are producing eggs in the Potomac River near Washington, D.C., and experts say chemicals in the water may be causing the condition.

Photograph courtesy U.S. Fish and Wildlife Service