amethyst gemclam
- kingdom: Animalia
- phylum: Mollusca
- class: Bivalvia
- order: Venerida
- family: Veneridae
- genus: Gemma
- species: Gemma gemma
Alameda- Albany
- Arcata
- Bay Point
- Bayview
- Belmont
- Belvedere
- Bodega Bay
- Bolinas
- Brisbane
- Corte Madera
- East Palo Alto
- Emeryville
- Foster City
- Hercules
- Larkspur
- Lincoln Village
- Martinez
- Montalvin
- Monterey
- North Richmond
- Pinole
- Pittsburg
- Pleasanton
- Redwood Shores
- Rodeo
- San Diego
- Sausalito
- Tara Hills
- Tiburon
- Vallejo
- Waldon
- Walnut Creek
California- Branford
- Branford Center
- New Haven
- Norwalk
- West Haven
Connecticut- Key West
Florida- Nahant
- Provincetown
- Revere
- Vineyard Haven
Massachusetts
United States