So I moved Emmie Lou, the platinum marble angelfish who was born to Lindsay Buckingfish and Stevie Fishnick right here in my own home, into his tank. (Shown below)
Because one should never introduce just one angelfish to a different tank, I also moved Alfreda AKA Alfie, a koi angelfish.
If I introduce just one angelfish to a group of angels, the newcomer will often be the target of territorial issues and bullying. By introducing two at once, especially in a tank with only three others present, it changes the dynamics and there is less likelihood of bullying.
Both Emmie Lou and Alfie are females, which is also acceptable in a tank with three males. Had I introduced another male, I would have had definite problems.
So far, Emmie Lou and Alfie have taken up with Mr. Blue, which is exactly what I wanted to happen.
The largest angels in this tank are Walter and Jack, two huge (12 inch tall) blue angels. They are named for Grumpy Old Men Walter Matthau and Jack Lemmon, because they are always bickering. But they're brothers and I suspect if I moved one, they'd miss each other. Besides, nobody else wants to put up with them.