let us know how it does with coral. I felt that it was too likely to eat coral for my personal gambling, and hadn't heard of anyone roiling the dice themselves. The whole subgenus is pretty bad, I don't think any of its closest relatives are considered reef safe or with caution; C. capistratus, C. hofleri, C. humeralis, C. marleyi, C. ocellatus, and C. striatus are all pretty well know to be coral dangerous. Robustus is a pretty fish and I have been tempted by one before. You should post some pics and keep us updated how it goes for you.