https://www.beachexplorer.org/arten/gibbula-cineraria/bilder
Graue Kreiselschnecke (Gibbula cineraria)
grauegibbula
https://ns-mollusca.linnaeus.naturalis.nl/linnaeus_ng/app/views/species/taxon.php?id=121098
Macrobenthos of the North Sea - Mollusca: Genus Gibbula
of thenorth seamolluscagenusgibbula