Es posible híbridos entre Serrasalmus y Pygocentrus?

[Ruben]

Frank, I have one question: Is it possible that one piranha of serrasalmus genus and other of pygocentrus have breeding? if yes, have you seen any? if not, why not?
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Frank, tengo una pregunta: Es posible que una piraña del género serrasalmus y otra del pygocentrus se reproduzcan? En caso afirmativo, has visto alguna? en caso contrario, por qué no?

[Hastatus]

No, two different species, two different physiology and breeding requirements. Cichlid fish are able to crossbreed from different genera/species, but not piranhas.