i currently have three f1 red tiger motas (rio blanco) the largest of the three at less than two inches has turned into a murdering glass banging P I T A. challenges me every time i approach the tank, killed multiple adult guppies even though he or she cant possibly eat them. even starting to chase the other two into hiding spots. so at less than two inches i now have a monster that has to be housed alone haha. lets see or hear your stories, sizes, species.