Philippe Clement / Flat periwinkle (Littorina obtusata) shells on beach showing colour variations, Brittany, France
01630514
Nick Upton / Flat periwinkle (Littorina obtusata / littoralis) yellow form crawling over rocks exposed at low tide, Cornwall, UK, March.
01613847
Nick Upton / Flat periwinkle (Littorina obtusata), yellow form crawling over Spiral wrack (Fucus spiralis). Treyarnon Bay, Cornwall England, UK. September.
01613846
Nick Upton / Flat periwinkle (Littorina obtusata), yellow form from Atlantic Ocean. Cornwall, England, UK. September.
01478286
Alex Hyde / Common Hermit Crab (Pagurus bernhardus) in Flat Periwincle shell (Littorina obtusata). Isle of Mull, Scotland, UK. June.
01473808
Sue Daly / Smooth periwinkles (Littorina obtusata) on kelp, Derrible Bay, Sark, British Channel Islands.
01452674
MYN / Carsten Krieger / Flat Periwinkle (Littorina obstusata) from rock pool, County Clare, Republic of Ireland, August. Meetyourneighbours.net project
01452673
MYN / Carsten Krieger / Flat Periwinkle (Littorina obtusata) from tide pool, County Clare, Republic of Ireland, August. Meetyourneighbours.net project
01452668
MYN / Carsten Krieger / Flat Periwinkle (Littorna obtusata) on Bladderwrack (Fucus vesiculosus) from tide pool, County Clare, Republic of Ireland, December. Meetyourneighbours.net project
01121936
Christophe Courteau / Flat periwinkle {Littorina obtusata} Brittany France
01121937
Christophe Courteau / Flat periwinkle {Littorina obtusata} Brittany France
01401138
Nick Upton / Flat periwinkle (Littorina obtusata / Littorina littoralis) on Toothed wrack (Fucus serratus) submerged at mid tide, near Falmouth, Cornwall, UK, August.