Duracrete Slug
this slug, native to the undercity of the planet Courscant, was very similar in appearance and activity to the duracrete worm. The slug was differentiated from the worm by seven nodule ridges that lined the slug's back. These nodules were undigestible bits of concrete which were exuded as the slug digested its food. The duracrete slug could attained lengths of nearly three meters, although there were unsubstantiated reports of individuals measuring more than ten meters..