These slugs are the ancestors of today's terrestrial slugs. However, the need for watery surroundings has not been forsaken. The coating of slime surrounding my body is the means to living without a shell unlike my cousin the snail and not dehydrating. Slug slime is similar to a sponge in the way it absorbs water from the air and ground to keep my vulnerable body from drying out. This slime is also my mode of transportation.
Humans use hiking boots and vehicles to travel over rough areas.
I come equipped with only one muscular foot. If I were to wear a shoe it would cover my whole body and I would not be able to tell where I was heading. So instead, I secrete two different kinds of slime from a pedal gland located under my head. This slime then mixes, slides below my foot, and protects my sensitive foot from the ground. My slime is so protective that one day I even crawled over a razor blade that a camper had dropped, without getting hurt.