Tissue Recession

[bjkramer]

Anyone have any idea what could be causing tissue recession on this coral? I am also not certain of the id of it. What if anything can I do to treat it.

The image doesn't always show up, here's a link to it.

http://www.120gallons.com/2007/08/coral-recession.html

 

[seta45]

Bad chemistry, bad light or bad flow... any one of those can cuse tissue recession. More info is needed...

 

[bjkramer]

Chemistry is ok. Light is MH 175W and VHO actinics. Coral is near the top. Flow in the whole tank is medium to high.

 

[tmz]

I can't tell what type of coral it is from the picture. Looks like a chalice of some sort. If it's a montipora you could have parasitic nudibranchs. In any case you can try an iodine dip such as lugols and move the coral to perhaps less light and a different flow.