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The Fanshell (Cyprogenia stegaria) has a roundish shell that is usually less than 3.2 inches
(81cm) across, and is light green or yellow with green rays. The inner shell surface (nacre) is
silvery white. It is a freshwater mussel that likes to live in free-flowing, clean, well-oxygenated
streams or rivers, preferring sand, gravel, or cobbled bottoms. Freshwater mussels eat
microscopic organisms such as algae, phytoplankton, and other floating particles.
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