Raspberry peanut butter mead, this happened after racking into tertiary. Primary and secondary had raspberries freefloating in the container, so it miiiight just be floating bits of raspberry. When I shake it up, they briefly sink and float back up.
I use an auto siphon, sanitizing everything of course. Primary had freefloating raspberries, then same with secondary when backsweetening. Racked to tertiary after a week and that’s when this appeared, and I had never seen that before in a batch.
You make a great point in that I could definitely just scoop it out, then if it returns I have my answer. Thank you!