Mine is in with a flame hawk and a juvi red corris wrasse, he doesnt pick on anything, and the other fish seem to leave him alone (they can sting).  I used to have an emerald crab that he left alone (till the wrasse killed it).  I dont have any shrimp yet, but the plan for the 60g that he'll be going into (minus the wrasse) includes some shrimp.   
  
I think if you search for the long fin wasp fish you will find a little more info (still not a ton).   
  
I spot feed mine, as they aren't stellar swimmers (I use a turkey baster and put the food in the tank near him or right in front of him to ensure he eats).  He was already eating frozen when I got him. 
		
	
		
		
		
		
		
	
		
		
	
	
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