Doesn't look like any Nudi's are on there, so that's good news. The vermetids are a pest, but doubt they would cause the bleaching. I'd keep looking for other issues as the source of the problem.
You did mention / remind me that your tank is in the sun room. I'm wondering if maybe the glass windows acted like a magnigying glass and maybe too much light got concentrated on that small square patch? I realize that's reaching, but you never know.
George - Blackwood, NJ (Near Aquarium Center)
75g Mixed Reef, 30g sump, Bubble Magus NAC7 Cone Skimmer, VorTech MP40 wavemaker, ApolloReefLED Dimmable LED's, Reef Angel Controller
Those are spirobid worms. I'm sure I spelled it wrong. The vermitid snails are in long tubes. These worms kind of have tiny fans that come out. The underside of many of my caps have them as well. Not a problem on my side. Personally I don't think they are causing the problem.
If there was nudis they would basically eat the coral not cause a bleaching like event. When I had those the montis flesh literally disappeared overnight.
agreed..spirobid worms.
http://www.melevsreef.com/id/crawls.html
Unfortunately I do not believe they are the cause of the receding cap though.
Phil....AGA 120...started nov 2008; bc29 seahorse...started june 2012. "tried the adventuring life, didn't care for it. Too much pain, not enough profit".
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