I am sure that "Aro" is trying to piss off my armatus. The 2 seem to get a long for a pretty long time until the Armatus starts to lunge at my Armatus when they are on opposite sides of the tank. I am assuming the Armatus sees silver shiny meal charges then aborts when he sees it is too big. The Aro the proceeds to swin in circles around the Armatus almost like he is provoking him. I love both fish. The Aro has actually bitten the armatus a few times. The Armatus has only lunged and snapped at the aro a but never followed through with anything. Am I asking for my Aro to get shanked? I love both fish. The Armatus is a prehistoric beast and the aro has an incredible personality. I am just wondering if anyone knows if this is somewhat normal behaviour of he aro? As stated before it is almost like the Aro is instigating a problem. Or maybe just asserting himself??