I'll be tagging along to this one. I have a pagoda as well and hadn't been feeding it (I've only had mine a few weeks). I target fed it some mysis a couple days ago (turned off my powerheads and squirted some onto the polyps), and it looked like they got eaten. Nothing was happening very quickly, so I didn't stick around, but the tang didn't seem to be messing with the mysis actually on the pagoda, and when I looked back in the tank 10 minutes later, they were gone. I have also noticed a little filter type sweeper that comes out of the center, so I'm guessing besides being photosynthetic they do some filter feeding as well.