Well, not only did I do a liver flush, I followed it with an enema, which maybe I should have mentioned, so no telling what could come out.
I have decided on this issue: If it looks like a cherry tomato skin and acts like a cherry tomato skin (indigestible) and feels like a cherry tomato skin, it's probably not a duck (or a fluke)! :-D
They no way looked like those pictures of liver flukes.