What's wrong with my zoas (photo)

[zoohoot]

Hi all. Any idea what's wrong with my zoas? They are normally open and happy all day, but for about the last week small areas of them are closed up like you see in the photo.

Key info:

• In my tank for about 6 months
• Have been growing/spreading well for about 4 months
• Water params are good/haven't fluctuated
• Tank is 20 gallons
• Neighbors: frogspawn, glaxea, green star polyps

I was thinking maybe the frogspawn is stinging them? As you can see in the photo I have a few small bubble algae in the area, but otherwise the tank is in great shape.

Thanks for any info you can share.

 

[B-Willz]

Zoapox

 

[dalston]

Agreed, does looks like some pox on some of those polyps, read the link for more info on the infection...

http://www.zoaid.com/articles004.php