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Physella heterostropha (Say, 1817) Pewter Physa |
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| Like other aquatic species, Physella heterostropha has the ability to adjust its buoyancy and literally float on surfact of the water as shown below. |
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On vegetation, Lake Oneida, University of North Florida, Duval Co., Florida 3/28/2005 (about 7 mm.) |
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