I am not sure, since I have not seen this before, but it looks like I have some sort of mold in my wort on an all extract beer I am making. I did the same as always, which was to oxygenate my wort before pitching for 10 minutes using a sanitized air stone and hose. Everything was sanitized before starting so I am not sure what happened here. This was the last of the Mr. Beer extracts I had. Nothing added except their booster. It was not out of date, nor was the yeast. I took a gravity reading today and that's when I found THIS: Any help is appreciated. Does this need to be trashed or what?