What's wrong with my zoas?

[juanmanuelsanchez]

I noticed this in my zoas a few days ago. They don't seem to open now. No other colony seems affected.

Any ideas?

Thanks in advance.

 

[cloak]

Maybe they're being overrun by that sponge?

 

[juanmanuelsanchez]

So that's a sponge? I though it was something else

 

[Michael Naegeli]

Yes that’s a sponge. Try tweezer it out if bothering Zoa. It’ll grow rt on them in some cases. Not often but yours seems to be goin that route