I have no experience with them other then knowledge that you should use caution when adding them to a reef tank. 
They can and will eat snails as well as shrimps. 
 
If your worried about it nipping at your corals keep a close eye on him, or return him to the LFS. 
 
Even if he isn't nipping at them today, tomorrow he may. 
Use caution with all triggers. 
		
	
		
		
		
		
		
	
		
		
	
	
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