Toughest fish, pound-for-pound?

[UnstoppableJayD]

Large Royal Pleco! (one killed my lacerdae wolf fish)

baller

 

[markstrimaran]

Common mid west creek chub.
Black stripe. I had one kill 12 same sized shad in less than 10 minutes. Survive in ice water to 90 F.

 

[mattison187]

Auratus, or convict. Both are little terrors.and ofcorse flowerhorns are generally all pretty mean.

 

[Brock11]

lol I have 2 right now. Ones a beast at roughly 9" and the other is catching up around 6"ish right now. I can't believe you didn't get a TON when you went to the marsh...I threw so many back haha.

Where can you get pickerel?
Thanks

 

[Brock11]

The first time I went I caught a couple dozen but they were all 1" or less and the two I took home just kind of disappeared. Every time I've gone since then, I haven't caught any, or even mudminnows which were much more plentiful. I only occasionally catch a yellow perch or bowfin there when I fish it.

Catch me a pickerel! Please!

 

[jaws7777]

Gotta be snakeheads. When i was a kid i had a 75 gal completely over stocked (no internet or common sense back then)
Picked up two snake heads after they hit 6 or seven inches they atarted killing everything in there. Even killed a royal pleco smh

 

[amazonkid]

Yes snake heads are killers. I had a 16" one that broke the glass top and jumped out of tank and was on the floor there was a brick on the top also. But him back in the tank float around for a day and half and now still going at 25". Also flower horns these guys try to eat my arm if I have to go in tank for something they leave nice round teeth marks on your arm.

 

[Ihsnshaik]

Red tail cat fish. It will swallow everything possible. / thread

 

[Quason778]

Toughest: Any of the Hoplias Wolf Fish species or Snakehead, they both can survive with low water quality and I believe both can survive out of water for a long period of time.

Most Aggressive: IMHO Hoplias Aimara Wolf Fish. I've kept Pirhannas and a Snakehead in the past and they have nothing on these demons. My 2 Aimaras make me want to apologize everytime I walk past my tank, lol...

 

[jstevenz]

Dovii, festae, wolf fish, jag cichlid, snakehead. All tough as nails and aggressive as hell