We have a Strawberry Pseudochromis (Pseudochromis porphyreus) which is sometimes confused with, and even substituted for, the Orchid Dottyback (Pseudochromis fridmani).
Have read once that the Strawberry is the more aggressive of the two, but can't tell by this one - not a problem getting along at all, and with a small Cleaner Shrimp in the same 29gal tank for a few months.
I think it would be a problem with similar small fish, but with a dwarf angel and a tang, there's really nobody to fight. I'd describe it as "intent but peaceful."
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Alan
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