species 2,755 observations
Northern Horse Mussel
Modiolus modiolus
Field notes
Modiolus modiolus, common name northern horsemussel (Scottish Gaelic: clabaidh-dubh, Scots: clabbydoo), is a species of marine bivalve mollusk in the family Mytilidae.
Read more on WikipediaRange
Greener is more native, amber more introduced; paler is less certain. How this was decided