There is no puffer that is "reef" safe. "Reef" safe doesn't mean just coral. No puffer can resist no eating a shrimp, hermit, etc. They can not resist the "smell". I've imported those by the boatload while working in wholesale. They LOVED eating shrimp. They also loved eating snails, clams, oysters and picked on LPS like they were going out of style, just like any other Canthigaster sp.
Spectrum smechtrum. They all prey upon something that falls into the "reef" category.