Northern horsemussel
- kingdom: Animalia
- phylum: Mollusca
- class: Bivalvia
- order: Mytilida
- family: Mytilidae
- genus: Modiolus
- species: Modiolus modiolus
- Frederikshavn
North Denmark
Denmark- Seltjarnarnes
Capital Region
Iceland- Shimoni
Kwale
Kenya- Luxembourg
- Frösakull
- Träslövsläge
Halland- Helsingborg
- Landskrona
Skåne
Sweden- Scarborough
England- Oban
Scotland
United Kingdom