Most fish, in my experience, pick on fish from the same family. My tangs only attacked other tangs when new ones were introduced. The dwarf angels did the same. My blue fairy wrasse has picked on/chased out of the tank at least 2 or 3 other wrasses. These same fish do not seem to react when a fish of a totally different family is introduced.
BTW, try to get a mandarin that is already eating mysis if at all possible, although if you are getting it for flatworm control, then there is another food source for it in your tank already. Most dragonets are difficult to convert over to non-live foods.
Good luck.
Anthony
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If you see it, can take care of it, better get it or put it on hold. Otherwise, it'll be gone & you'll regret it!
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