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External Websites
- National Center for Biotechnology Information - PubMed Central - Snail
- West Virginia University - Slugs and Snails
- The Spruce Pets - What to Consider Before Keeping a Pet Snail
- WebMD - Snails: Are there health benefits?
- Royal Horticultural Society - Slugs and snails
- University of Florida - Gardening Solutions - Snails and Slugs
- University of California Agriculture and Natural Resources - Integrated Pest Management - Snails and Slugs
- Texas A&M University Extension Entomology - Snails and Slugs
- Nature - Snail shell colour evolution in urban heat islands detected via citizen science
Britannica Websites
Articles from Britannica Encyclopedias for elementary and high school students.
The structure of snail shells explainedOverview of snail shells.
See all videos for this articlesnail, a gastropod, especially one having an enclosing shell, into which it may retract completely for protection. A gastropod lacking a shell is commonly called a slug or sea slug.