Study discovers why guppies are colorful

U.S. scientists say they have discovered why male guppies, the most fertile member of the fish tank, are so colorful.

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<p><a href="http://www.physorg.com/news68388565.html">Study discovers why guppies are colorful</a></p> <p>U.S. scientists say they have discovered why male guppies, the most fertile member of the fish tank, are so colorful. </p>