Either way there is a risk. They are not as bad as most think. I personally would have no concerns keeping a mala with other large fish in a suitable sized aquarium.
I have two Curupira. One is a stroppy $%^&*$ and can not be kept with anything. The other I have with SD's and have previously had other to big to eat species. Only issue was other Hoplias, regardless of species.
Also have two Aimara. One by itself and won't tolerate anything in it's tank, The other is in a 8' with some large Brycon and ATF for well over a year now.
Also have a Lacerdae type that can be kept with anything as long as it's too big to eat.
I have two Curupira. One is a stroppy $%^&*$ and can not be kept with anything. The other I have with SD's and have previously had other to big to eat species. Only issue was other Hoplias, regardless of species.
Also have two Aimara. One by itself and won't tolerate anything in it's tank, The other is in a 8' with some large Brycon and ATF for well over a year now.
Also have a Lacerdae type that can be kept with anything as long as it's too big to eat.