I ate some trigger fish livers at a Mayan banquet in Quintana Roo some years ago; they were wrapped in foil to hold the oil, and baked in a pit with banana leaves. Fortunately it was not the main course- strong stuff. Said to be very healthy and had cultural meaning.
My high-end grocer (Sarasota) sells grouper cheeks for a king's ransom, so there must be something to them. If someone has a tasty but not too complex method of preparing them, I would like to try. Thanks,hounds