Curious. Can you elaborate on what damage they would do? I googled and don't see anything related to problems around corals (other than the shear size of them which could easily make coral frags for you), only inverts are listed as non compatible. Are they like the Bluejaw Trigger in reef tanks... just so clumsy they don't care what corals they break?Arothron species are just a big no-no. They are going to be, by far, the most destructive.