I would think the zoas would be toast quickly; I had a magestic in my old tank and it took to zoas and button polyps almost immediately. I've read the same about zoas and regals. I don't have, nor plan to add any zoas in this tank, so I'm not worried about it nor do I know if this angel would eat them. The potters took almost a month and half before eating anything except picking at the LR and glass. He seems to pick all day long, but all my sps and one clam are always open, so he must be leaving them alone. As said though, angels are hit and miss with corals. I think though that the regal and potters are about the safest out there, except the geni varieties.