Rockpool Top shells

Rockpool Top shells

Observation - Rockpool Top shells - UK and Ireland. Description: Masses of these were grazing algal covered boulders in rockpools in Wales. I think the bold patterning and lowish profile make them Flat rather than Grey top shells.

Masses of these were grazing algal covered boulders in rockpools in Wales. I think the bold patterning and lowish profile make them Flat rather than Grey top shells.