Advise on tank bully

[NightShadeFairy]

Well I am glad to know the correct breed. Would I call it a Galaxy Clarkii, or a Meteor Clarkii, of a Galaxy Meteor Clarkii? Lol!
Mine has actually been very docile until I added the yellow tang.. They are completely fine now though I might add, it's like the problem never existed. And, I might add, this clown is a lamb compare to my black and white I used to have.. That thing would attack my arm (with painful missile like attacking bites) every time I put my hand in to clean the glass. It would also attack the power head I used to blow off the LR every so often. It was awful. My Clarkii has been so docile and friendly up until that yellow tang! Perhaps it has finally gotten big enough for his aggression to kick in? That, and I hadn't added any new fish for a long time as my tank was too small. Once I upgraded tank size and then added the tang is when he started this bad attitude.
Glad things are great now, but I am certainly wary of my next addition.. Glad I have these suggestions to distract him now!