Definitely need to see a pic, but almost every time I transfer into carboy, I get tiny yeast floaties, that get brought to the top by CO2 bubbles. And they tend to merge together and form larger clumps. I freaked the first time it happened, thought for sure I had an infection. Since then though, I've noticed it's the same thing every time. Those CO2 bubbles look like white mold growing from a distance, until you get up real close and see that they are just a bunch of tiny bubbles.