My rice wine has this odd clump in it that looks kind of ... SCOBY-ish?
I used to brew kombucha years and years ago. It's definitely not a kombucha SCOBY, but it is kind of rubbery like a kombucha SCOBY, which is why my brain jumped to that comparison. The Shanghai yeast balls I used for this do contain bacteria and fungus to break down starches, so I think it's theoretically possible that it could have formed a "Symbiotic Culture Of Bacteria/Yeast" aka SCOBY.
According to the SCOBY wikipedia page [link], rice wine can form a scoby. Unfortunately the page doesn't include a picture of what a rice wine scoby looks like.
I asked for some advice on reddit.
The ppl on r/prisonhooch are useless. Hilarious, but useless. They're all just like, "Drink it and let us know if you die!"
Someone on r/homebrewing suggested it might just be a clump of amylopectin from the sticky rice I used. They also said it probably wasn't a SCOBY unless my ABV was really low, which, well, doesn't actually rule out that it's a SCOBY because it appeared when my ABV was low and then stopped growing once my ABV got higher.
They did assure me that as long as my ABV was higher than 4% (it definitely is) this scoby/pellicle was waxy/slimy (as opposed to powdery) it was probably completely harmless.
I think the batch is probably safe for consumption.
I'll strain it tomorrow and give it a taste test.
The last taste test I did about a week ago (two weeks ago?) was, well, not especially delicious, but not bad in an unsafe-to-drink kind of way, either. Maybe a bit more sour than I expected. I think it might have tasted better chilled, so when I strain it, I'll give it two taste tests, before and after chilling.