Tiny bubbles on hystrix branches

lobino69

New member
Hello folks,

I have an hystrix for about a year in my tank.

It is getting necrossis on some branches for a week or so.
I have cut off the dead branches but it seems to appear randomly on many other branches...

Looking closer I can see some tiny bubbles on the branches. I am not sure it is related. When I snap the bubbles I notice some even tinier white thing floating away (eggs ?)

For information I haven't add anything new in my tank for about 3/4 months.
I havent moved the coral from its original spot
No problem for other corals

You can clearly see those bubbles on the below branch on the pic

<a href="http://www.casimages.com/img.php?i=15112901291216652413789081.jpg" title="hebergeur image" target="_blank"><img src="http://nsm08.casimages.com/img/2015/11/29//mini_15112901291216652413789081.jpg" border="0" alt="Hébergeur d'image" /></a>
 
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