Oh ok. I thought you had them in the same tank.
I just wondered if this is the way he'll always be, or if once he's acclimated to the new tank he'll come out and let us see him more.
I haven't ever had a shy jag or even recall anyone ever mentioning that their jag was shy. He should settle down soon, especially in a bigger tank.
There's a couple things you can do to get him better acclimated. Try moving the lighting to the back of the tank so he feels safer in the darker front part of the tank. That way he'll go to the front more in time. Make sure he has a lot of hiding places so he doesn't feel the need to swim/dart halfway across the aquarium to hide. You can dim the lighting a bit if you think he's acting more skittish because of the lighting by wrapping some electrical tape around it. I would also crawl on your hands and knees up to the tank to see him instead of walking and that might help.
The last 2 suggestions don't need to be used tho, and if you do, just do them for a day or two because you want him to get used to you guys and his actual surroundings. I've never had to do any of this for cichlids, just piranhas because they are more skittish.
Is he the kind of fish that will recognize the owner and greet you when you walk in the room? Understand what I'm trying to say?
Yep, I know what you're saying.
IME, they don't "greet" people like oscars do. Mine were pretty mean and came to the glass and tried to bite at anyone that came near his tank. I always hand feed all my CA/SA's and he was no exception. It seems like all CA/SA's I've had didn't really like anyone but me. If I walked up to the tank, they would come looking for food, but if anyone else did, they totally ignored the food aspect and either ignored the person or tried to get thru the glass at them. I have no idea how they kow who is who, but they always seemed to.
I'm sure you could get your jag to interact with you if you want to put in the time with him.
PS:
Just in case, make sure you feed him and not your husband so he'll like you better.
That will really get him going and you can just say "I don't know why he does that, maybe I'm just a better fish keeper."