Is this a Leopard slug? I have over a hundred in my garden. They eat dead and fresh plant leaves. I`ve been collecting the brown slugs and putting them near a pond for the frogs. I also have a huge slug which I know is a Leopard slug, it eats other slugs.
You need to be on the main ispot site (not the forum) and click on the ‘add observation’ button and then put the image and location. The forum is for discussion rather than identification. There have been plenty of leopard slugs and yellow slugs added and if you add an observation you will see all the other observations of these species so it is easy to compare