The dead or undead fish is the bigger Jag with less contrast. I haven't vented any of these guys yet, just my usual ignorant speculation. I've been guessing based on myths i've heard about their dorsals and markings along the lateral line. I had originally guessed that the 2 big ones were males while the Dovii and the small Jag were chicks. I'm betting I am at least right with the Dovii, it was the smallest least colorful fish out of the 12 in the tank at That Pet Place and that's usually a decent indicator. (If they weren't 12 bucks I would have picked up a few.) I know its way too early but if you feel like tossing around any wild guesses or theories I wouldn't hold it against you, I like me some speculation. By the way are you running a store over there in Jersey? I'm big on dragging at least one of my kids to fish stores almost weekly.