On Dec 31, 2006, barksy from Brisbane Australia (Zone 10a) wrote:
This slug is native to the warmer parts of the SouthEast US. I found him-her living in my compost pile. Most of the slugs that I am familiar with have a smaller mantel on the first third of the animal. I have never seen a slug where the mantel covers the entire animal. So I was not sure what it was. I found a nice University of Florida site http://creatures.ifas.ufl.edu/misc/florida_slugs.htm that helped me identify it. I am not sure how much damage this creature in particular causes in my garden but I have noticed a fair amount of snail/slug damage lately.