I have the same thing in my RIS. Same timeframe. Planning in bottling this weekend, but not sure if its going to be OK. Sample tastes fine, but I'm leary. Any feedback on this?
They look like yeast rafts. How long has it been in the primary? If you are going to age it in the carboy I would rack it off the yeast. Use a secondary for long conditioning periods.
take a gravity reading and if it has dropped out like normal it is fine. looks like one of my stouts so i turned it into a sour stout. add a pack of lactobacallus and let it sit for a few months. as long as gravity dropped its a healthy strain of bacteria.