These days, you are almost better pointing out a lionfish. The last couple of years when we were diving LC, when we see a grouper posing over a coral head or a hole in the reef, you almost always find a lionfish inside instead of a squirrelfish. I would assume it is the DMs still trying to teach them to eat lionfish during the cull dives. Can't remember if it was 2013 or 2014, but we witnessed a large grouper and a good sized nurse shark at Mixing Bowl working over a small coral head extremely hard for about 5 minutes during our safety stop. I never got a look at what they were trying to get at, but both were working very hard trying to get something that was hiding in the coral. We had to head for the ladders, but they were still at it when we left.
As for the various individuals playing Ben, there is one that has a greenish monofilament tag that has long since been encrusted with algae. He has been around for probably at least the last 6-8 years we have been diving there and is VERY interested in getting petted. There are plenty of other friendly groupers, but he is identifiable by his tag. It has been interesting to watch the tag get steadily more and more growth on it as the years have gone by.