species 22,414 observations
Common Periwinkle
Littorina littorea
Field notes
The common periwinkle or winkle (Littorina littorea) is a small intertidal snail species. It has a mantle, gills and a shell with an operculum, and therefore is a marine gastropod classified within the family Littorinidae, the periwinkles.
This is a robust intertidal species with a dark and sometimes banded shell. It is native to the rocky shores of the northeastern, and introduced to the northwestern, Atlantic Ocean.
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6
native plants
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Range
Greener is more native, amber more introduced; paler is less certain. How this was decided