Fuzzy appearance. Not larva (I'm not that blind ). On the honey frames. Looks cottony. Nothing on the capped combs at all. So I don't think it is mold because it would be growing on the caps as well. I have been feeding 1:1 getting them ready for winter, but I have never seen this before. I only noticed it in one hive.
Should I be worried??? Otherwise hive seems healthy. I did a full inspection mid-October to winterize them. Only went back into today because it is warm here and wanted to check honey stores once more so I didn't look for eggs/queen this time...They were doing fine the last time I checked.
Location: North of Atlanta