Slug 

The slug is an invertebrate, this means that it lacks bones.

The slug is a land living mollusc.

Slug in damp grass.

  Slugs are only active in temperatures of about 5°c. In dry cold conditions they prefer to stay deep inside the soil.  

  Slugs are similar to snails, but they have no shell. Instead, they have a horny plate concealed under the mantle or saddle