Very pretty boys! I'd love to see a side shot of your second guy.
As far as clear shots, my boys usually like to hover and show off their fins after they flare at their reflection in a mirror. During this ~10 second window, I take as many pictures as I can. Have you tried something like this? Also, I feed crushed pellets during the photoshoot, since I've had luck with them staying still waiting for more food to drop.
Just a couple ideas, I know some fish just aren't willing to be still long enough for a photo no matter what you do.