Length 80 to 130mm. Also called the ‘Irish Yellow Slug’, this is a medium-sized to large slug with a short keel. The body colour varies from pale ochre through to yellow-green to grey. The body has dark blotches or spots. The mucous is colourless. It has grey-blue tentacles. Similar to the Yellow Cellar Slug (Limacus flavus), which is a brighter yellow, has smaller spots and blotches, and has blue tentacles.
It feeds on seedlings, vegetables, fungi, lichen, and decaying matter. It will even feed on pet food found indoors and old, damp wallpaper.
Commonly associated with gardens and houses, and it will venture indoors after dark. It prefers dark and moist habitats, and it may frequent cellars, greenhouses and sheds. Common and widespread throughout Britain and Ireland.