I believe they have a large preference towards sps but have a particular special spot for sponges; i could see them picking at lps and softies too though.  the problem with a lot of angels is that they are largely hardwired to these foods and often just won't accept prepared foods.  Make sure whatever food you offer is rich in sponge content.  I have heard that coral beauties are the least likely to pick coral within the angelfish; lol which makes them 50/50 really.  blue faced and imperators are usually kept in FOWLRs for a reason; probably are a few exceptions... there always are... but i doubt there's more than a few.  im no angel expert though. 
		
	
		
		
		
		
		
	
		
		
	
	
	 |