If they are smaller then the managuense(jag) then they will be looked at as food. managuense are piscavorous(fish eating) so any weaker fish will be prey to them. I had a 3 in. managuense eat a 1 1/2in nicaraguense before so if the other fish are still alive by the time you read this please move them or divide the tank or they will be hunted down & eaten. I also had a 5 in. jag eat a 6 in. redline SH (when they were legal in the states). the SH was sticking out his mouth for 3 days. But SHs are slender.web2844;568411; said:The jag wasn't too aggressive. He didn't bother the aro. I just went fish shopping. I picked up a fh, convict pair, and a red devil. the jag is by far the largest fish. He is about 6 inches, and everyone else is pretty tiny. I hope everything works out.