The most aggressive freshwater fish in the world?

[cockroach]

If we are talking total damage done, the list has a few of the brutes.
If we are talkin' pound-for-pound, A-hole ornery. A mature red-tailed black shark, Epalzeorhynchos bicolor, is an absolute hazard for many tank mates.

 

[neoprodigy]

my money is on the aimara, thing would chase me outta its tank... i think an xl rhom would bite you if one tried to pick it up, otherwise its a chicken

this!

 

[Fanatic_Fish_Lunatic]

Lol african lungfish aren’t aggressive the others you said are correct

I'm here again after I have an African lungfish of my own now. You may take your words back. That fish hate other fishes with their entire being of existence.

 

[vincentwugwg]

I've had the opportunity to work/keep most of the fish mentioned in this thread. The only fish that I have feared for my personal safety was a very large Hoplias Aimara that I was keeping. I honestly believed that the beast had bad intentions for me and it was capable of carrying out those intentions. 'Mangle' is the word that comes to mind when I think of what that fish can do to my arms/hands.