How To Get Rid Of Slugs - The Easy Way

Slug is a common name that is normally applied to any gastropod mollusc that lacks a shell, has a very reduced shell, or has a small internal shell. This is in contrast to the common name snail, which is applied to gastropods that have coiled shells that are big enough to retract into.

All slugs are descended from snails that gradually lost or reduced their shells over time. However, the shell-less condition has arisen many times independently during the evolutionary past, and thus the category "slug" is emphatically a polyphyletic one. The various groups of slugs are not closely related, despite a superficial similarity in the overall body form.

There are marine and terrestrial slugs, but the common name "slug" is most frequently applied to air-breathing land species, while the marine forms are known as sea slugs. Land gastropods with a shell that is not quite vestigial, but is too small to retract into (like many in the family Urocyclidae), are known as semislugs.

Category: Image - :Laevecaulis-2.jpg|thumb|right|150px|Tropical leatherleaf slug, Laevicaulis alte|alt=Photo of small brown invertebrate with a stripe running down its back, sitting on a rock.