This is indeed an aerator, but it might be a pain to remove, given that it is recessed like that...they are made to be replaced, though, because they clog with hard water deposits, as mentioned above...there may be a special tools for ones like this, not sure
				
			 
	             
 
		
 
 
		
 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		