species 4,117 observations
Flat Periwinkle
Littorina obtusata
Field notes
Littorina obtusata, common name the flat periwinkle, is a species of sea snail, a marine gastropod mollusk in the family Littorinidae, the winkles or periwinkles.
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2
native plants
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Range
Greener is more native, amber more introduced; paler is less certain. How this was decided