Zoanthids - Too much light?

[Agent003]

I just noticed a couple of my zoas have these white circles. Is this a sign of too much light?

[pk-sd]

I doubt that. How much light do you have on your tank ? I also see red mushroom just to the left of the zoas(I think). They will complain of too much light long before the zoas.

Looks some kind of fungus, I could be wrong though. Check out Aquarium Corals by Eric Borneman, might give you better explanation.

PK

[mer116]

looks fine to me. zoas do go through color morphs like sps corals

[treylane]

I agree with mer116 - plenty of zoanthids have white pigments.