clown and purple tang together?

I would think so. Shape & patterns are different.
Clowns are only slightly less aggressive than Sohoal's so later on down the line things could change.
 
Not saying to do it, but I have kept a clown tang with my yellow and naso for over 2.5 years. He runs the tank and is quite aggressive. Bought at 1.5 inch but now pushing 8.5 inches.
 
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