I have had a jag pair since about 1" (ofcoarse didnt know it was a pair till they had fry)anyways they were only about 7" and have been giving me about 600+ fry about every 3-4weeks I only kept a few and the rest were just eaten by my endli's. Anyways I caught some vieja on a collection trip and they were all smaller but I went out tonight and one of my jags was hiding in the corner and looked as though he had every scale ripped from its body. I seperated it but it died within the hour. the other jag is just chillin with the vieja and no problems. My problem is I cant tell the sex of my jags unless they were spawning and now I dont know which one I have left. Also these fish are evil little bastards