Did not expect one here…right along shore; washed up from elsewhere?
Unsure, suggestions welcome
Olive/brown/dark foot fringe. A pale foot fringe would indicate Carolina mantleslug, and an orange-ish foot fringe and orange mucus would indicate Toga mantleslug.
For my own personal notes: near old north shore nest site
Coordinates approximate. It was near a trail in Point Pelee NP.