Several years ago, I kept a large specimen of this fish in my fish only tank and it thrived for several years with no issues (apart from getting a bit fed up with the cleaner wrasses' attentions!), and yet today I see dire warnings that they will poison your whole tank at the merest provocation. When my fish died, he still didn't exude any toxins into the tank as far as I know and I just removed his body from the tank and gave him a decent burial! The same can also be said about boxfishes, such as Ostracion cubicus - anyone here have any experience of this please?