Yes, it was natural fiber from banana, forget parasites
Natural white fiber from banana becomes dark yellow, brown or black, when exposed to digestive juices.
I have not seen your diper, so I can't say 100% these were not parasites, but I can say 99%.
Unfortunatelly, some people mistake banana fibers for parasites, they sometimes call it "Cotton Balls", "spider legs", "Mother Spider" ....
In the end, when carefully examined under microscope, these were just natural fibers from banana or from papaya (or other fruit that baby ate).
Often adult people find those, and they think thye got
parasites out. Do search on CureZone for "Cotton Balls" or for "spider legs" and you will find a lot of inf, and alot of misinformation.
Every baby (including my kids) fed with banana gets those "parasites". No, these were not parasites. I examined those under microscope (from more then one baby), it was identical to banana fiber, and does not look like any known parasite.
Microscopes don't lie.
Spirit