The molluscs are organisms who live in defined ecosystems. Their presence in an archaeological site reveals at least a part of the activities of the inhabitans. If the sea-shell is punched, then it has probably been used as an ornament or implement. As regards the Greek area in particular, our information on the importance of sea-shells is limited. From what we know until today, sea-shells have been mainly used for nutrition and decoration, while their use as tools has not been evidenced as yet. Their significance, especially for nutrition, will be better elucidated, when the relevant material from the cave of the Cyclope on Youra island will be published.

The study of the material found in the Greek area leads to the conclusion that the species used and their purpose of use present both sequence and continuity.