Only known from the lower Connecticut River in Vermont. The shad restoration program on the Connecticut River increased the range of Alewife Floater upstream about 125 miles.

 Key Characteristics

Conservation Status


Alewife floaters can be found in waters with a variety of flow rates and substrate including rocks, silt, or sand.

Host Species

Alewife, American shad, blueback herring.

More information


Found only in the lower CT River.

Distribution map has locations where this species has been documented and digitized into the atlas database. Systematic surveys have not been conducted for many species and those surveys that have been conducted have been largely focused on endangered species. Therefore, in some cases, the actual distribution of freshwater mussels may be more extensive than what is presented here. Shaded areas are watershed sub-basins and river main stems are shown.