Seen the stuff on the right, but don't know what it is. Parasitic waste? Giant Liver fluke starting to decompose? Doubt its a tapeworm.
Those on the left look so much like the fluke images shown on non-CZ medical and vet websites, your ID seems pretty solid there.
I watched a compilation of parasite endoscopies on Utube today. The living worms weren't even gross, but the latter part of the clip showed toxic yellow waste piles surrounding some of them -appalling. I wonder if some of the strange stool artifacts we see are these waste products: https://www.youtube.com/watch?v=D76qndUOSz4