Flat Periwinkle

Flat Periwinkle

Observation - Flat Periwinkle - UK and Ireland. Description: The Collins Seashore Guide describes a Flat Perwinkle as a ‘Shell broad and flat-topped, with only t

The Collins Seashore Guide describes a Flat Perwinkle as a ‘Shell broad and flat-topped, with only the slight suggestion of a spire’. This one is bright yellow, colour is variable though. According to the Collins guide, Flat Periwinkles lives and feeds on Brown Seaweed, usually Knotted Wrack.
.
It is difficult to separate this species as there is a lookalike. For information please look at this iSpotter’s observation, here:
https://www.ispotnature.org/communities/uk-and-ireland/view/observation/683652/flat-periwinkles