It’s still summer and the snail/slug season isn’t over quite yet! Learn how to get rid of them from Preferred Pest Control! The Facts about Snails and Slugs: Both of these animals, snails and slugs, have soft bodies, move very slowly, and are typically 20-100mm in length. Unlike slugs, snails have shells and are able to use them as defense mechanisms incase of prey or dangerous weather conditions. In desperate cases, snails have shown to seal their shells and stay alive inside for years at a time! A perfect habitat for both the snail and the slug would be somewhere damp and hidden, such as under rocks, logs, and other ...