The bottom of the snail’s body is called a FOOT. This is what makes it move. Inside the FOOT are lots of muscles, just like we have muscles in our bodies. When the muscles work, the FOOT moves and the snail is able to move around. A fully-grown adult snail, or one that will not get any bigger, is easy to spot. Look at the open end of the shell and you will see a small lip sticking up. It means that the snail has stopped growing.