What is this

[jpinetti]

So I don't normally rack to secondary but I'm gonna dry hop this IPA recipe and decided yesterday to rack and wash yeast. I'm 8 days into fermentation. Checking on the brew today i find this. White spots floating. Yesterday's gravity check showed great progress and it's doing well so I know there is plenty of alcohol present to keep back most troubles. So what can this be? Just co2?

 

[jonmohno]

Yes its fine just yeast rafts.Or co2. That looks like you have a lot of headspace in there,though.

 

[jpinetti]

Thanks bud

 

[2brew1cup]

Had this in my secondary. Also with much too much headspace. Just like stale CO2 bubbles sitting on the surface. They dont pop because of the CO2 cap/air pressure.