Montipora digitata - what is it ?

[FenSaLir]

Hi all,

first i have to say i am new in hobby and i have few montipora digitata frags two weeks, they seem to prosper well. Yesterday evening one of the best frags looks normal as you can see here and today morning i woke up and on three spots i saw kind of milky semitransparent bubbles and polyps are somehow lifted with that bubbles foto . I don't know if this is like new branch or kind of necrosis. Polyps still looks healthy and moving in stream.

Thanks for help

 

[FenSaLir]

just found similar topic . I am not 100% sure but looks exactly the same to me.

 

[FenSaLir]

Attached better picture