Hard bubbles on Sun coral?

[Enygma_0]

All, I have bubbles coming out of the live rock adn sun coral in my tank. Does anyone have any ideas what this stuff is?

 

[Fluff]

bubble algae. Valonia.

 

[XXFirefighter]

bubble algae. Valonia.

Exactly...
pull and twist it CAREFULLY !
DO NOT POP

 

[Brad]

You know...valonia will only grow in an area that gets a lot of light. That sun coral doesn't need ANY light. It's a non-photosynthetic coral that requires feeding.

I think that is your solution. Move the coral to a dark place in the tank.