i've got no idea what that is but it looks like some kind of funky infection to be honest. if it is the batch is probably lost but if it still tastes good, getting it cooled down (and drunk) as fast as possible would probably be advised. are you kegging or bottling?
Permalink Reply by MrC on April 30, 2010 at 7:49am
Looks pretty bad to me. I've read that in some scenarios (mold?), you can skim off the nasty bits and the beer should OK as long as it tastes OK. Personally I'd tip it out and move on.
What sanitiser do you use? Get some starsan if you haven't already.
I've had that before - it tasted alright so it went into the keg and was a good beer.
I'd be VERY careful bottling this batch. Some wild yeasts will continue to ferment higher sugars slowly over time that normal sacc yeast can't, this can lead to bottle bombs, so be careful with those bottles.