Hello; maybe a roundworm?
Hey there!
Those are definitely the "setae" or the bristles from an earthworm. I had the EXACT same microscopic experience scoping the poop from a green terror - saw all these, they look kind of like worms... but they don't move and all have the same rigid shape. I had fed earthworms lately, and it occurred to me that they might be the bristles. Looked up examples of earthworm bristles, and that's totally what they are. So, no concerns as far as I know.![]()