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			| Not true.    
But you should never put axolotls of various sizes in the same tank. | 
	
 If they must be in the same tank, a spacious tank should be used, as well as keeping them approximately the same size, so as non will pick on each other.
MoxCo., I rather doubt an Axolotl would go so far as to kill another one...not directly, at the very least.