Doug;
For the first 5 months or so that I had my Scopas Tang he was very skittish/twitchey. He would always hide and only come out when you were a few feet back from the tank.. If you so much as looked at him, he would be hiding again.
After about the 5 month period or there abouts he is cool and calm as a cuke

. He's a very diffrent fish now.
Anyway I don't know if this helps but good luck.
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No matter what the morrow brings, inventors keep inventing things.
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Jonathan
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