I brewed a black IPA on the 18th of November. Tonight I opened it up to take a gravity reading and add dry hops and found this. The gravity is close to final. The yeast used was US-05.
I dry hopped an IPA I brewed the day before (used US-05 in this as well) and it was at it's FG.
It looks like a krausen to me, but wanted to double check. I've had a few homebrews so I decided to throw in the dry hops anyway, and now I'm wondering if that was the wrong choice.