Physella heterostropha (Say, 1817) Pewter Physa

Physella heterostropha (Say, 1817) Pewter Physa

Physella heterostropha (Say, 1817) Pewter Physa

    Like other aquatic species, Physella heterostropha has the ability to adjust its buoyancy and literally float on surfact of the water as shown below.

Physella heterostropha (Say, 1817) Pewter Physa

On vegetation, Lake Oneida, University of North Florida, Duval Co., Florida 3/28/2005 (about 7 mm.)