need help identifying whats floating on top

[dgez]

I've had a bock lagering at 37 degress for about 4 weeks now. I noticed about 3 weeks ago that there was a thin film of something on top. I figured its yeast. From 2 feet away you cant even see it because its such a thin layer. Today I looked at it again today. Although it has not grown any in 3 weeks, I noticed that when I bumped the carboy, it broke apart like ice. Not sure what this is. I took a sniff and it smells great, so I'm not too worried.

 

[Yooper]

That's not a very good picture, but I think it looks like the beginning of a lacto infection. I hope not, but it doesn't look good.

I'd probably be inclined to rack it from below the film, and into a smaller carboy to avoid any more exposure to air.