I have had many types of triggers puffers sharks rays and eels .... out of all that the only fish I have ever had a problem with biting me was a damsel. He would repetidly attack me . . . Granted I never gave the green moray a chance I kept my hand far away from him and used a stick for feedings . Nut hey I call that common sence.
Even my undulated trigger never took a nip at me and he was one mean dude with a major attitude . A lot of fish will even become hand tame and allow you to "pet" them . I had a very small SFE that would swim into my balled up hand to feed so as the trigggers couldnt get to the food . It would always nose around me when I was in the tank looking for treats !