We bought an Aratua and put her into a tank with our Black Convict hybrids.Didn't realize ALL of my fish in that tank would wind up dead.Were fairly sure she did it,so we put our really big male hybrid into her tank.Now she's following him around the tank and nibbling his lower fin(in a very NON aggressive way).Could she be trying to breed and is it possible for these fish from two different continents to breed?