I wish they were not worms, but everything in my experience, research, and consultation with various health practitioners leads me to believe they are. I added a couple more pics to the other post to show additional variation in their appearance.
As others who have had a roundworm infection can attest, they don’t often come out looking like plump white earthworms. Instead, they are dead, partially digested, and stained the color of the intestinal contents. The worms I pass are not plankton-like at all. They have a firm, rubbery texture. They are strong and can be roughly handled without breaking apart.