White stuff on zoas

[Llamafluf]

I have been out of town for a few days and I had my sister looking after the tank. Today when I looked at my zoa colonies I noticed several things off. There where some white stuff on the zoas. Hope someone can help me figure out what it is.
For some reason it would not let me upload the images here so I had to post them on another site please take a look. http://imgur.com/a/1ZLIl

 

[Llamafluf]

It would only let me post that one image for some reason please use the link for the rest.

 

[aName]

The first photo looked like it could maybe be a zoa-eating nudibranch, but it's hard to tell.

 

[MikeyAl]

Looks like nudibranch- I had some hitch hike when I bought a colt coral. Try a dip in ligols or coralRx and see if the fall off.


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[MikeyAl]

Really hard to tell. Could it be zoa pox? Pretty common.


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[cloak]

Check this out.

http://www.coralpedia.com/index.php?module=Gallery2&g2_itemId=384

HTH.