Toothed wrack (Fucus serratus) fronds, exposed on beach at low tide, Reculver, Kent, England, United Kingdom, Europe

Common periwinkles (Littorina littorea) on toothed wrack (Fucus serratus) exposed at low tide, Lyme Regis, Dorset, England, United Kingdom, Europe

Serrated wrack (Fucus serratus), view of seaweed dry on the shoreline, clearly shows serrated feature, St Abbs, Scotland, UK North Sea