Porphyra laciniata
- kingdom: Plantae
- phylum: Rhodophyta
- class: Bangiophyceae
- order: Bangiales
- family: Bangiaceae
- genus: Porphyra
- species: Porphyra laciniata
- Helgoland
Schleswig-Holstein
Germany- San Pedro
- Santa Cruz
California- Old Saybrook
- Old Saybrook Center
- Saybrook Manor
Connecticut- East Falmouth
- Marblehead
- Medford
- Nahant
- Quincy
- Somerville
Massachusetts- Narragansett Pier
- Newport
Rhode Island
United States