Most aggressive piranha?

[Big Jay]

I can't believe no one mentioned Sanchezi. I have a Sanchezi in a 40. The thing is a little murderer. I've had him for about a month now and the thing is AGGRESSIVE. Second I open the tank he's at the surface pacing the glass looking for something to eat. They top out at 6" which is nice. Would be perfect for a 55. I purchased mine from Aquascape. Below is a pic, not mine, but to show you how cool looking they can get.

 

[xiao]

I am looking to buy a 5-6inches black diamond piranha, please email me : xiaosu1995@gmail.com

 

[Geryi]

Hi everyone,

In my opinion, cariba is the most aggressive Pygocentrus species and manueli the most aggressive Serrasalmus species.

Bye.

 

[Yuki Rihwa]

Serrasalmus Alongatus! Anything that move in their tank = dead meat.