COMMON PERIWINKLE

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Littorina littorea

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Overview: The common periwinkle is mainly found on rocky coasts in the higher and middle intertidal zone. It sometimes lives in small tide pools ranging from 1 to 2 m or about 3 to 6 ft in characteristic size. It is also found in muddy habitats such as estuaries. They are situated on the splash zone, the extreme high tide mark. Normally the Periwinkle can be found in groups clinging to rocks, on which they feed on the algae growing.

Where to See: Look for the living creatures in the rock pools  at low tide in amongst the rocks.
Empty shells can be found anywhere along the tide line.
Size:  1-3cm