Alewife floater



Alewife floater


(Anodonta implicata)

Photo 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. Click here to see which watersheds and/or waterbodies 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






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