I've noticed that some people have had success mixing different pike species in a couple of their tanks. Some people have argued that putting different groups together will diminish the aggression between the pikes. For instance, puttin Lugubris group pikes with Reticulata group pikes. I personally have had luck keepin several species of Lugubris pikes together in fairly large tanks. Granted, they were all subadult, and there were enough pikes to break up the aggression. Just curious what everyones views on this matter are. Let'er rip!!