Strange Bubbles on Coral

[jeslynben10]

Any idea what these green little bubbles could be? It's been about a week since they showed up and seem to be getting bigger

 

[melosu58]

Usually I have noticed That when you see these bubbles it start of cyano. I would siphon them out Be sure not to Harm the corals

 

[Andy Sager]

It looks like a type of Valonia algae. Check this out: Section: Algae (Green): Group: Bubble Algae: Species: Valonia macrophysa (Bubble Algae)
There will be suggestions for how to control it and what it means when you have it.