Acans receding - looking for suggestions on possible causes

[gregzz4]

Originally Posted by Salty23

any updates? what has happened to the Acans?

Funny you ask. I just found one of my most fave acans in the clutches of the black longspined urchin, with the Ecotech coral glue busted loose
Could just be a coincedence, but now I'm wondering ...
I didn't find anything on the web about urchins eating acans
Yesterday, this particular colony was fine, now it's missing more heads
The rest of the receding acans are unchanged

Mike, I've cut my lighting way back, so I'm hoping to see a difference

Shelley, I read about someone losing acans and finding a kind of bristleworm in the skeleton. Kinda like being eaten from the inside out maybe ...

Seriak, it seems that none of us can keep all the kinds of corals we want to. Some of us lose 'this one', and some 'another'
I'm just happy to not have lost most of ours