A 2026 study examined the five mucus types produced by C. nemoralis to determine how composition affects mechanical properties.

Snails generate mucus for locomotion and defense, and some species secrete distinct fluids when disturbed.

The research team applied proteomics, X‑ray fluorescence, X‑ray diffraction, cryoscanning electron microscopy and liquid chromatography to analyze the samples. All five mucus types contained collagen IV as the main structural component. Differences in protein abundance and the addition of amorphous calcium carbonate (ACC) determined each mucus’s mechanical characteristics. The two defensive mucus types exhibited higher protein counts than the remaining three. The authors concluded that protein quantity and ACC influence cross‑linking density, which directly alters network strength. Calcium is secreted with the mucus, acting as an ion source for cross‑linking and as a mineral precursor for reinforcement.

The findings may guide materials science research, while the specific role of the defensive mucus in predator deterrence remains to be clarified.