ID please!

[powertodareefle]

I found these today on three of my Zoa frags.
They look like eggs, But I am a new reefer and I'm in need of some help.
The one in the upper center even looks like it has eyes.

 

[Crabs McJones]

Bubble algea? or air trapped under algea.

 

[ebushrow]

Bubble Algae....Emerald crabs do eat it.

 

[Brendan Caldwell]

Bubble algae... if they're on frags you could just scrape them off quick. If they happen to burst, just put your zoa frags in some RO water for a few minutes. Zoas can last in RO for like 15 minutes with no problem, but the bubble algae spores will die off within a couple minutes.