Monostroma fuscum
- kingdom: Plantae
- phylum: Chlorophyta
- class: Ulvophyceae
- order: Ulotrichales
- family: Gomontiaceae
- genus: Monostroma
- species: Monostroma fuscum
Victoria
British Columbia
CanadaNortorf
Schleswig-Holstein
GermanyBerwick-Upon-Tweed
England
United KingdomDutch Harbor
Unalaska
AlaskaFriday Harbor
Port Townsend
Washington
United States