Callithamnion byssoideum
- kingdom: Plantae
- phylum: Rhodophyta
- class: Florideophyceae
- order: Ceramiales
- family: Callithamniaceae
- genus: Callithamnion
- species: Callithamnion byssoideum
Saint Ann’s Bay
St Ann
JamaicaSwanage
England
United KingdomBridgeport
Mystic
ConnecticutEdgartown
Gloucester
Nantucket
North Plymouth
Plymouth
West Falmouth
MassachusettsAtlantic City
Jersey City
New JerseyJamestown
Newport
Portsmouth
Rhode Island
United States