The grouper on LC and CB were friendly long before the lionfish ever showed up in the Caribbean.
Agree that the 'friendly' behavior predates the lionfish.
I should have made it more clear that this was an observed behavioral shift since my visit last year. For all my prior years going to Brac/Little, there was the "old reliable" attraction over at Marilyn's Cut on Little, but an equally friendly grouper on the Brac was quite unusual. I've also noticed
over the years that the degree of interest and the number of thus behaviorally modified groupers on Little has also varied.
We have a video from a dive on LC during our Honeymoon in 1995, and you can see the videographer having to reach out from time to time to push "Charlie" the friendly grouper out of her shot. He just liked to have his head rubbed by divers and would follow you around until he found somebody willing to give him a few pets.
I think "Charlie" had replaced "Ben" from a few years earlier: I was on a LC dive in 1990 with a Macro tube set on my Nikonos and couldn't shoo him off until I zapped him, which resulted in this photo:
BTW, do you remember the name of that LC videographer? Since you said "her shot", I'm wondering if this was Aileen Kane, who used to work at LCBR back around that period.
In any case, I do agree that we should expect to see attempts being made at behavior modification of Caribbean predators to try to teach them to take lionfish on their own. As of my trip last month, the most up-to-date local conclusion seems to be that the moray eels are still so-so; the groupers are happy for handouts (some are more aggresive than others) but haven't started to take lionfish on their own.
On Little, the operations (including Reef Divers from the Brac) have reportedly decided to suspended spearing in Bloody Bay/Jackson's while they're out with guests, as the blacktip sharks have gotten a bit TOO friendly...there's apparently been a few wrestling matches from sharks who didn't wait for the DM to take the Lionfish off the spear...and the DM didn't want to get in trouble with his boss (& DoE) for losing a spear. The plan was being formulated; expect that they're going to run a staff-only friday afternoon diveboat to do a big sweep once per week so that the sharks will be less likely to associate it with divers as a potential "daily meal".
I do have to admit that the one blacktip that I ran into off the wall at Jackson's was a lot less timid and interested in staying around, despite me approaching him with my UW camera ... it was probably the closest I've ever gotten to a blacktip in the Sister Islands in the entire 23 years that I've been going there.
-hh