Nick Upton / Green-leaf worm (Eulalia viridis) scavenging on rocks encrusted with Barnacles (Semibalanus balanoides). Treyarnon Bay, Cornwall, England, UK. September.
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Robert Thompson / Dog whelk (Nucella lapillus) and Common barnacle (Semibalanus balanoides) on rock. Mill Quarter Bay, Killard Point National Nature Reserve, Strangford, County Down, Northern Ireland. February.
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Robert Thompson / Painted top shell (Calliostoma zizyphinum) and Common barnacle (Semibalanus balanoides) on rock at edge of Strangford Lough. Mill Quarter Bay, Killard Point National Nature Reserve, Strangford, County...
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Olga Kamenskaya / Barnacle (Balanus balanus) underwater, off the coast of Svalbard, Norway, September.
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Nick Upton / Group of Dog whelks (Nucella lapillus) in an intertidal rock crevice among Acorn barnacles (Balanus perforatus) and Beadlet anemones (Actinia equina), Cornwall, UK, April.
Nick Upton / Common limpet (Patella vulgata) and young Acorn barnacles (Semibalanus balanoides) attached to rocks on seashore, north Cornwall, UK, September.
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Nick Upton / Patches of Wart lichen (Verrucaria mucosa / Wahlenbergiella mucosa) growing on rocks exposed at low tide alongside young Acorn barnacles (Semibalanus balanoides), Millook Haven, Cornwall, UK, Septembe...
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Alex Hyde / Acorn barnacle (Semibalanus balanoides) growing on shell of Common Mussel (Mytilus edulis), Isle of Skye, Scotland, April.
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Alex Hyde / Acorn barnacle (Semibalanus balanoides) Isle of Skye, Inner Hebrides, Scotland, UK. April.
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Pascal Kobeh / Giant barnacles (Balanus nubilus), Alaska, USA, Gulf of Alaska. Pacific ocean.
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Chris Mattison / A figure from Antony Gormley's 'Another Place' installation covered in barnacles, including the invasive Austrominius modestus. Crosby, Merseyside, UK, April 2014.