Zoa with mouths protruding

Mmsetta

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I've had this colony for over a year (started with one polyp). Moved tanks about 8 months ago and they never picked
ImageUploadedByREEF2REEF1451405480.356122.jpg
ImageUploadedByREEF2REEF1451405493.264695.jpg
up steam in terms of growth. I've moved them around a bit to get right light and flow.

I know I read before somewhere that protruding mouths on zoas are a tell tale sign of something, but I forgot what. So, now I see when the whites come on the mouths protrude upward. I have attached a couple of pictures. This is about 10 minutes after whites turn on. None have melted away, but I've had zero spread and growth in quite some time.

Too much light? Any advice is much appreciated!
 

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