Nick Upton / Snakelocks anemone (Anemonia viridis) attached to a boulder alongside Coralweed (Corallina officinalis) and Flat / Purple top shells (Gibbula umbilicalis) in a rockpool, Rhossili, The Gower Peninsula,...
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Nick Upton / Common brittle star (Ophiothrix fragilis) moving over floor of rockpool encrusted with red algae (Lithomnanion sp.) past Flat / Purple Top shell (Gibbula umbilicalis) low on a rocky shore, near Falmou...
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Nick Upton / Broad-clawed porcelain crab (Porcellana platycheles) hiding behind Gutweed (Ulva / Enteromorpha intestinalis) in a rockpool alongide a Flat / Purple top shell (Gibbula umbilicalis) and a Limpet (Patel...
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Nick Upton / Common brittle star (Ophiothrix fragilis) moving over floor of rockpool encrusted with red algae past Flat / Purple Top shell (Gibbula umbilicalis) low on a rocky shore, near Falmouth, Cornwall, UK, A...
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Nick Upton / Common brittle star (Ophiothrix fragilis) moving over floor of rockpool encrusted with red algae past Common periwinkles (Littorina littorea) and Flat / Purple Top shell (Gibbula umbilicalis) low on a...
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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...
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Alex Hyde / Selection of gastropods commonly found in rockpools, clockwise from top left: Periwinkle (Littorina compressa / nigrolineata), Dogwhelk (Nucella lapillus / Thaius lapillus), Common Flat Periwinkle (Li...
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Sue Daly / Purple Topshell / Flat Top Shells (Gibbula umbilicalis). Channel Islands, UK, April.
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Sue Daly / Purple Topshell / Flat Top Shells (Gibbula umbilicalis). Channel Islands, UK, April.
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Stephen Dalton / Flat topshells (Gibbula umbilicalis) in rock pool, UK
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Philippe Clement / Flat top shell (Gibbula umbilicalis) shell on beach, underside, Normandy, France
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Philippe Clement / Collection of Trochidae with Pennant's top shell (Gibbula pennanti), Flat top shell (Gibbula umbilicalis) and Grey top shell (Gibbula cineraria), Normandy, France
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Philippe Clement / Flat top shell (Gibbula umbilicalis) shell showing the aperture, Normandy, France
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Philippe Clement / Flat top shell (Gibbula umbilicalis) shell on beach, Normandy, France
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Philippe Clement / Collection of Trochidae with Pennant's top shell (Gibbula pennanti), Flat top shell (Gibbula umbilicalis) and Grey top shell (Gibbula cineraria), Normandy, France
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Philippe Clement / Flat top shell (Gibbula umbilicalis) shell, Normandy, France
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Simon Colmer / Beadlet anemone (Actinia equina) in rock pool with Common limpet (Patella vulgata), American slipper limpet (Crepidula fornicata), Flat top shell (Gibbula umbilicalis) and wrack seaweed, Sussex, UK
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Simon Colmer / Green shore crab (Carcinus maenas) in rock pool with Beadlet anemone (Actinia equina), Common limpet (Patella vulgata), American slipper limpet (Crepidula fornicata), flat top shell (Gibbula umbilical...
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Nick Upton / Two Common prawns (Palaemon serratus) foraging in a rockpool near a Flat top shell (Gibbula umbilicalis). Rhossili, The Gower Peninsula, UK, July.
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Nick Upton / Common Hermit crab (Pagurus bernhardus) in a Dog whelk shell crawling over floor of a rockpool littered with shell fragments and grazing Flat top shells (Gibbula umbilicalis). Rhossili, The Gower Peni...
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Nick Upton / Group of Flat / Purple top shells (Gibbula umbilicalis) grazing algae from a boulder in rockpool. Rhossili, The Gower Peninsula, UK, July.
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Duncan Usher / Flat Topshells (Gibbula umbilicalis), Common Northern Whelk (Buccinum undatum), and Common Periwinkle (Littorina littorea) shells