The fellow I spoke to at the Delray event is Christopher of
http://aquaexposure.com/, an underwater photographer of some skill. He has a killer close up (1/64 inch away form the domeport, maybe less) beak-on shot of a queen trigger. Anyway, he lived in the Turks and Caicos for about six years and saw a lot of lionfish and interactions. He was the one that told me about the consumption of cleaner fish normally safe from ells to cuddas to groupers and the dozen or so small fry sighted off Jupiter. Bet he has still more stories related to lionfish and other invasive species.