Thank you for visiting the New Hampshire Fish and Game Department website. www.wildlife.state.nh.us NH Fish and Game

 

 

Alewife floater (Anodonta implicata)

Alewife floaterPhotograph courtesy of E. Nedeau

NH Conservation Status: Not listed

 

NH State Rank Status: Vulnerable to extirpation or extinction (globally secure)

 

Distribution: Parts of the lower Connecticut, Merrimack, and coastal watersheds. See which watersheds and/or waterbodies PDF Document the species has been documented.

 

Description: A large, elongate and thin mussel reaching 6-7 inches in length. Shells are usually yellowish-brown or blackish and have prominent growth lines. The inside shell is usually a white or pinkish color.

 

Commonly Confused Species: Eastern floater, creeper

 

Habitat: Rivers, streams, ponds, and lakes with either constant or absent flow. Substrate varies from cobble to silty or sandy.

 

Life History: Host fish include the anadromous alewife, blueback herring, and American shad.

 

Conservation Threats: Pollution, dams restricting anadramous fish distribution.