What type of piranha?

[BlueTailCatfish]

I recently have converted almost all my tanks to reptiles. I only have 2 small setups left (of course i got my monster tank)

But i want a aggressive in your face solitary piranha that has big teeth.


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[cichlidsmart]

Maybe a piranha in the Serrasalmus genus. What about the Serrasalmus Manuelli or Rhombeus(green tiger or red eyed)?