What is the meanest fish with the worst temperment you have ever kept?

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For me it would be the black piranha I had when I was a teenager. This piranha was the most mean fish I have ever had. I actually took the piranha back to the pet store and that was that. Back then I did not know much about piranha and I did not know what I had. I wish I understood what I had and then I would not have sold him back to the pet store. Now I own another black piranha and many other piranha and I love them all.
 
Modest_Man;1480630; said:
I have one that smokes cigarettes and carries a switchblade.
:nilly:
 
16 inch male butti. wouldnt let me clean the tank and killed a 12 inch male dovii , the dovii pretty much owned him but one day he snapped.
 
My 8inch thai Kml FH. He almost killed a 13 inch oscar yesterday in my 200g. While I took a 20 min nap.

My 4 inch jag that killed a GT and a Oscar both twice his size.
 
Small but deadly, the freshwater puffer. In order of aggressivness:
Freshwater puffer
Oscar
Betta

And at the top of that list will be an odo when i get it!!!!!! :D :D :D :D
 
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