The Most Aggressive Freshwater Aquarium Species

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Midas are aggressive, but not the most aggressive.
 
a male con is only its most aggressive when paired and breeding w a female making it a 2 fish team. Thats my experience of breeding them for a few yrs. When breeding they r very aggressive but ive twice seen a pair of big breeding cons lose to 1 single fish. One time it was a chipokae african cichlid and another time the petsmart "red texas" abomination. Opposing fish was the same size or smaller than male con. ill have to post the video 1 day of the pair fighting the petsmart abomination.
 
I think for cichlids that would go to the Dovii and Midas/Red Devil (either one).

Characins I'd say Snakehead hands down, followed by Wolf fish and the Wyckii.


Convicts are overrated.
 
For me hands down its the wolf fish man those things are aggresive as hell big or small they ripped up my fish good with those nasty jaws...ppl shud think twice before putting them in a comm :/


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Sailfin Pleco, when they want to be.

Mines an angel most of the time but when he wants it hurt a fish...he WILL, but not often thankfully :).
 
for me hands down snakeheads.... bad experience with those demons... long time ago I had a crazy over stocked 75 gal back then their was no internet so my research what the lfs told me and I was just a kid gar,oscars, Dempsey, pac and cats anyway I came home with a redline and African snakeheads... tore everything thing apart the little beasts didn't even eat the fish just killed for sport..
 
So far from what I've owned cichlid wise is my stalsbergi aka OG green terror. The other day I saw some chasing n looked and when the gt got hold of a slightly smaller Geo he ripped an eye off it, then killed it trying to get the other eye. Pretty brutal. Then when it was dead he was parading around the tank with his kill

Non cichlids from what I've owned is my red wolf, he likes to decapitate fish but not eat them. He has done this to 2 needlefish, a jewel cichlid, 2 arcara threadfins and one albino Senegal bichir. And has left a scar on my pinky finger that's still visible over a year later.

From what I've seen, streamlined open water fish has gotta go with GATF or armatus. I've seen videos of big atf just ripping the jaw off a tankmate and leaving it to die.

Every feeding video of a big predator comm I've seen that has an armatus they are always the ones constantly trying to kill until the feeders are gone.

Bottom dwelling ambush preds though gotta go with aimara. They get huge and have an attitude to match how fierce they look. I've heard they attack people in the water in SA, fishermen untangling their nets or divers. Nothing deadly of course.

Cichlids I haven't owned, gotta go with Flowerhorn. They lower their heads and charge like a bull if you put your in lol. Plus they got some teeth.

But any fish with a big mouth and teeth is dangerous if its starving. Think of how fierce the packs of vatf get when the catfish breeding season comes, you literally see bits of fish flying out of the water.

Yeah snakeheads are mean but not as stocky and muscular as wolves. I'd put money on an aimara in an aimara vs giant snakhead fight. I recall a member on here saying his 12 inch mala wolf killed a 14 inch giant snakehead
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I'm voting for the lamprey as a contender...plus they are just creepy looking.
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