Collecting snails on the seashore is a widespread yet underestimated custom. According to researcher Michal Kowalewski, from the University of Florida, it is estimated that around 10,000 tons of marine snails are removed from beaches each year, as a result of millions of tourist visits.
Despite seeming insignificant, this gesture is generating a profound environmental impact, especially in areas like the Mediterranean, where mass tourism has radically transformed coastal ecosystems.
More tourists, fewer snails: a direct and concerning relationship
Over the last few decades, the number of beach visitors has multiplied by 2.7, while the physical conditions—waves, climate, species dynamics—have remained stable. Studies show that the ecological indicators associated with snails (such as species diversity, sizes, and predator perforations) have not changed significantly. This suggests that the main alteration comes from human activity, including:
- Rapid coastal urbanization
- Increase in recreational boat traffic
- Use of heavy machinery for beach cleaning, which crushes the snails
- Direct collection by tourists
Marine snails: much more than decoration
Although they decorate shelves at home, snails are key actors in ecological balance on the beach. Their presence ensures:
- Physical stabilization of the sand, preventing erosion
- Regulation of water pH, thanks to the calcium carbonate they release as it dissolves
- Recycling of essential minerals, like calcium, which benefits marine life
- Shelter and habitat for algae, seagrasses, hermit crabs, coastal birds, and small invertebrates
- Material for nest construction and beak sharpening in shorebirds
The loss of snails alters the physical, chemical, and biological balance of beaches, affecting their resilience and biodiversity.
Environmental education: key to protecting snails and beaches
Raising awareness among vacationers can reverse the silent damage caused by mass tourism.
“We can still reduce our footprint while enjoying the coast,” Kowalewski states. The most powerful tool is environmental education, which allows:
- Informing about the ecological value of snails
- Discouraging their collection as tourist souvenirs
- Promoting environmentally friendly practices
- Incorporating environmental content into signage, campaigns, and local guides
“Taking a snail may seem like nothing. But it’s unnecessary. It’s better to leave it where it is,” concludes the researcher.
Conscious tourism: preserving the invisible is also part of the journey
The next time you walk along the coast, remember that each snail fulfills a vital function.
Leaving it in place is a simple gesture that contributes to protecting biodiversity, maintaining marine cycles, and preserving the ecological balance of beaches.
