I decided to do a little policing of my own fish ID's. So, now I've confused myself about how much variation in color and pattern to expect between a Gag and Black Grouper. I'm almost 100% certain the first photo here is a Gag, but is the 2nd a Gag or a Black? The 2nd photo does not seem to have any kind of notch or spine on the edge of its cheek (which would be characteristic of a Gag). Also, the 2nd photo has "chain-like patterns" (vs. "vermiculations") which is more like a Black.
You guys who have seen a few: What do you think? Thanks