Not reef safe as they will eat invertebrates and may bite into corals. Good fish for FO or FOWLR tanks. When mixing with other fish, you need to make sure that they’re not too aggressive as some fish, like triggers, can bite the spines and kill the puffer. Also, while you may find it interesting to see the puffer blow up, it’s not a good thing for the puffer and could even cause it to die. You need to feed it a good diet of shell fish and fish to keep it fat. Because of their beaks, they shouldn’t be kept in acrylic tanks, as they can take bites out of the acrylic and leave scratches.