The snail forms the operculum when conditions are right (when the temperature drops to 5 or 6 º C, or in the summer months when it's warm enough), can also form when the food is no need to live.
Helix aspersa in the operculum is very thick mucus and consistent solidified. The epigram in the area that matches the blowhole becomes porous, through the gas exchange area with the outside When in this state of isolation is protected not only from potential predators but also the loss of water from your body that it would be fatal. A thick and well formed operculum is a sign that the shell is strong, and has been nursing well.
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