Zoa problem?

[jjencek]

I have had zoas for over three years. Never had to think about them much. They grew like weed and I just kept selling the trimmings.

Today I notice something weird. Some of them are starting to "bleach". It seems to be random polyps. I have not seen anything like that before. So I figured I would ask. See attached image. The only thing I changed the day before is to increase my photo period from 9 hours to 12 hours.

Is this something to worry about?

 

[jjencek]

Here is another photo where it seems to be just starting.Two zoas in the middle where the white is radiating out ...

 

[billdogg]

I would guess that they are just adjusting to the new lighting. Nothing to worry about (probably). Any and all corals will adapt to changing lighting - often that includes a change of coloration.