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
Alderney