Common periwinkle
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The common periwinkle or winkle is a species of small whelk or sea snail, a marine gastropod mollusc that has gills and an operculum, and is classified within the family Littorinidae, the periwinkles.
Sea snail, underneath, full view
Littorina littorea 001
Shell of the common periwinkle
Remains of an ancient meal. Winkle shells from Cantabrian Lower Magdalenian layer (15 000 before present) in the Altamira cave
Sea snail
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Sea snails are slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with land snails, and with slugs, which
Common periwinkle
…The common periwinkle or winkle (Littorina littorea) is a species of small whelk or sea snail, a marine gastropod mollusc that has gills and an operculum, and is classified within the family Littorinidae, the periwinkles. This is a robust…
A species of sea snail in its natural habitat: two individuals of the wentletrap Epidendrium billeeanum with a mass of egg capsules in situ on their food source, a red cup coral.
A sea snail Euthria cornea laying eggs
The shell of Syrinx aruanus can be up to 72 cm long.
A hermit crab occupying a shell of Acanthina punctulata has been disturbed, and has retracted into the shell, using its claws to bar the entrance in the same way the snail used its operculum.