Ok, my step brother own's a pair of CON's(3 inch) living with a 15 inch male dovii, so today I drove over to his house to visit, and his CON's would fight every single fish in his tank(250 gallon). While we were eating I heared this slamming noise?? I checked his tank...the dovii was try to eat their fry, but, couldn't... the pair were teaming up, against his 15 inch dovii, the female would nip the dovii in the eye's and the male would nip at his tail. This right here prove's that CON's are the meanest fish ever!! If you dont think so..tell me why??(what's the story?). thank you...please leave a comment.