zoa help - bleaching?

[w16227]

<a href="http://www.flickr.com/photos/73291058@N08/6653801747/" title="zoos by w16227, on Flickr"><img src="http://farm8.staticflickr.com/7031/6653801747_54858b1b99.jpg" width="500" height="331" alt="zoos"></a>

Colony is newer - some of the zoos have been "stretching" and bleaching out. Does not seem to be spreading fast, but want to know what should be done to treat if this is serious.

The other heads seem to be doing ok - and I see some spreading out of the main mat to the adjacent rocks.

This is the best image I have at the moment - I took this after cleaning the glass so several heads are in the process of closing/opening. Typically - the majority of the heads are open and looking good (to me anyway)

THANKS IN ADVANCE

 

[NanoReefWanabe]

there is a couple spots that look suspect, look for bugs/nudis/pests on the colony...other then that i would say you have a colony of two different zoas and a type of paly...looks fine to me.