I don't know how to get rid of mine.  Got peppermint shrimps and it did nothing, got a copperband butterfly and he does not eat them, tried Aiptasia X and it does not kill them and they just return after a week.  My next option if I can find them will be berghia nudibranchs. 
  
The most anoying are those that are popping in the middle of my zoanthids colonies and stopping the zoanthids from opening. 
		
	
		
		
		
		
		
	
		
		
	
	
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