I found any fresh fish was better then store bought bait but not catfish, I caught hard head cats one time to use for bait and still caught a few but it was like half what you normally catch so you could tell that it wasn't a very good a bait. 
  
seams even crabs don't want to eat hard heads if they have a choice
		 
		
		
		
		
		
		
		
		
	
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