Pound for Pound toughest fish?

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I didn't read all 40 pages of this thread, so someone may have mentioned this fish already, but my pick would be an alligator gar. I'm not sure they are as aggressive as some of the other fish mentioned here, but they are armored plated. I'm not sure any of these fish with teeth that have been mentioned would do that much damage. My brother in law caught a 70 pounder while working in New Orleans on the levees this past summer. It took 6 of them (all drillers) with a razor sharp machete to clean him. It took all their strength to cut through the armor plating.
Here's a pic of one just a little bigger:
http://www.backwaterbowfishing.com/myweb/Texas May 2006 075.jpg
 
I had a redsnakehead a long time ago that was fine with all the tankmates that were previously in before his addition, even the smaller ones, but would kill any new additions to the tank no matter what their size. would shred them up it was really horrific.
He lost the battle that led to his ultimate demise with a very, very large electric cat addition.
Also, anything wallago are normally very aggressive and terrifying looking (specifically the attu).
 
Pound for pound, I think the winner is going to be a small fish, not a large one.

I've seen three inch long convicts beat the snot out of 10-12" jags (eggs of both species were present in the tank at the time and the convicts owned the tank while the big jags were stuck in the corner cowering).

I'm laughing at the oscar comments. Oscars are pretty docile as cichlids go.

I'd like to see how some of the popular suggestions here would hold up against a fahaka puffer.
 
viridari;2247094; said:
Pound for pound, I think the winner is going to be a small fish, not a large one.

I've seen three inch long convicts beat the snot out of 10-12" jags (eggs of both species were present in the tank at the time and the convicts owned the tank while the big jags were stuck in the corner cowering).

I'm laughing at the oscar comments. Oscars are pretty docile as cichlids go.

I'd like to see how some of the popular suggestions here would hold up against a fahaka puffer.

convicts are mean.
but theres plenty of fish that can take them out.
as for oscars,i totally agree...
and the fahakas.
i dont think i know of any fish that could take them.
 
Go Esox Lucius - Northen Pike. It can fight in warm and cold environment. Pound for pound - go pike!

PS: hmmm snakehead's body seems to be more rigid though. i have never touched a Esox before from pix seems kinda soft ... Still GO ESOX!!!
 
EASY A AUSTRALIAN BARRAMUNDI anythig the same size(pound for pound) it would just gulp up in one bite, there reflexes are also fast as soon as someting come to attack it it would be swolled hole. these fish fit anything in.

a mangrove jack is a Austrailian salt water ocean fish but can be keept in fish water if caught young in a brackish water (the live when young) there are like a meaner, faster, bigger bite red devil.

bump
 
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