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Unusual Moon Snail Egg Casings Wash Ashore in Cornwall

3/23/2026

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Summary

Story summary

Beachgoers in Cornwall and Devon worry about rubber chunks washing ashore.
Matt Slater, a Cornwall Wildlife Trust expert, says these are moon snail egg casings.
Casings can resemble plastic after sand accumulates.
There is an unusual number of casings this year.
Moon snails prey on other molluscs by drilling holes in their shells and using enzymes.

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Story summary

Beachgoers in Cornwall and Devon worry about rubber chunks washing ashore.
Matt Slater, a Cornwall Wildlife Trust expert, says these are moon snail egg casings.
Casings can resemble plastic after sand accumulates.
There is an unusual number of casings this year.
Moon snails prey on other molluscs by drilling holes in their shells and using enzymes.