Nick Upton / Common brittle star (Ophiothrix fragilis) moving over floor of rockpool encrusted with red algae past Flat / Purple Top shell (Gibbula umbilicalis), Rough periwinkle (Littorina saxatilis) and Thick-li...
01396681
Nick Upton / Group of Rough periwinkles (Littorina saxatilis) with various colours and patterns sheltering in limestone rock crevice high on the shore at low tide, alongside encrusting Montagus's stellate barnacle...
01396680
Nick Upton / Rough periwinkles (Littorina saxatilis) with varied colours and patterns sheltering in limestone rock crevice high on the shore at low tide, with several Montagus's stellate barnacles (Chthamalaus mon...
01395350
Nick Upton / Common limpets (Patella vulgata), Common barnacles (Balanus balanoides) and a yellow Rough periwinkle (Littorina saxatilis) nestling in depressions and under an overhang in sandstone rocks high on the...
01395173
Nick Upton / Common periwinkles (Littorina liitorea) alongside yellow and brown Rough periwinkles (Littorina saxatilis) nestled in a crevice in sandstone rocks at low tide, Crail, Fife, July
01395172
Nick Upton / Common periwinkles (Littorina liitorea) alongside yellow and brown Rough periwinkles (Littorina saxatilis) nestled in a crevice in sandstone rocks at low tide, Crail, Fife, July
01272012
Robert Thompson / Periwinkles {Littorina saxatilis} and {Littorina littorea} and Barnacles exposed on rock at shoreline, Killough, County Down, Northern Ireland, UK, December
01272013
Robert Thompson / Periwinkles {Littorina saxatilis} on rock, Strangford Lough, County Down, Northern Ireland, UK, September