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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Alex Hyde / Common Flat Periwinkle (Littorina obtusata / littoralis) against white background. From the Isle of Skye, Inner Hebrides, Scotland, UK.
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Alex Mustard / 2020VISION / Flat periwinkle (Littorina obtusata) feeding on kelp frond, Loch Carron, Ross and Cromarty, Scotland, UK, April
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Philippe Clement / Shells of the Flat periwinkle (Littorina obtusata) showing colour variation, Brittany, France
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Robert Thompson / Periwinkle {Littorina obtusata} camouflaged on seaweed, Ballyhenry Point, Strangford Lough, County Down, Northern Ireland, UK, September
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Philippe Clement / Flat periwinkle (Littorina obtusata) shell on beach, Mediterranean, France
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Philippe Clement / Flat periwinkle (Littorina obtusata) shell, Mediterranean, France
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Philippe Clement / Flat periwinkle (Littorina obtusata) shell showing the aperture, Mediterranean, France