Ceramium tenuicorne
- kingdom: Plantae
- phylum: Rhodophyta
- class: Florideophyceae
- order: Ceramiales
- family: Ceramiaceae
- genus: Ceramium
- species: Ceramium tenuicorne
Sooke
British Columbia
Canada
Sturkö
Blekinge
Slite
Gotland
Träslövsläge
Halland
Färjestaden
Oskarshamn
Kalmar
Ljunghusen
Ystad
Skåne
Öregrund
Uppsala
Sweden
Bridgeport
West Haven
Connecticut
Solomons
Maryland
Beaufort
North Carolina
Newport
Rhode Island
United States
Penzance