Interesting about the marinated fish. It must be the exposure time to the acids that kills them. We learned a good lesson on a Scout trip about small sticks and vines. A good case of ivy or oak. I try to stay away from vines, except mustang grape which are plentiful here. This is one reason I have enrolled in a Naturalist course. I was speaking with our Scoutmaster Saturday, and very few people can identify our living greenery.