Red seaweed
- kingdom: Plantae
- phylum: Rhodophyta
- class: Florideophyceae
- order: Gigartinales
- family: Polyidaceae
- genus: Polyides
- species: Polyides rotundus
Alberton
Prince Edward Island
Canada
Byrum
North Denmark
Denmark
Nortorf
Schleswig-Holstein
Germany
Falkenberg
Varberg
Halland
Höganäs
Skåne
Sweden
Kirkwall
Orkney
Rosehearty
Scotland
Dale
Wales
United Kingdom
Harpswell Center
Maine
Cohasset
Marblehead
Nahant
North Scituate
Massachusetts
East Quogue
Sound Beach
New York
United States