you would want to make sure to have enough "building material" for the little guy
I never considered a jawfish before for that very reason. That would have been a problem to have things rearranged because my tank was so crowded that a jawfish would have invariably used expensive frags as building blocks or caused aggressive corals to get to close to each other. But "thanks" to a kalk overdose last summer, and other various forms of coral attrition , I don't have that much of an over crowding issue any more.