Huge Red Flag.
I just tried a CBB in my 180g with a Red Sea Sailfin Tang. (among other fish) He did not like the CBB AT ALL. I'm pretty sure it's due to them both having vertical stripes of similar colors. He kept the CBB in one corner and he starved to death in a week.
If you are going to try this, I suggest a separate tank to get the CBB eating well and fattened right up, so he is very healthy when he has to go up against the Tang. Idealy this would be in a 'fuge or something with the same water, so the CBB dosen't have to deal with the shock of acclimation on top of everything.
I'm sure it can be done, but don't just put these fish together and cross your fingers. (mistake I made)
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