I was just observing my mystery snail with my nose mere inches from the glass when I noticed what looked like an anemone on its shell! It was tiny, with a pinkish stalk about 1mm long with 5 threadlike "arms" maybe 2mm long each. It shrank its arms in when the snail's movement brought the creature in contact with the glass but it came back out a few seconds later. Is there such a thing as a freshwater anemone? I thought they were all saltwater!