Yes, beer does. Poor a bottle of beer into a glass, drink it, but don't clean the bottle. Leave the bottle for a few weeks exposed to the air, and you will almost certainly have a lot of mould in the dirty bottle.
However, I've never seen mould in a secondary, where it's shielded from all the nasties. It's not uncommon to get foam, yeast etc comming to the top. In fact, it's normal.
Relax, in another month or two, you will be drinking great beer.