Most aggressive freshwater fish?

[RealCrix220]

my personal story would be when I was sold 3 Mesoheros Ornatus ( or so I was told they were ) I had 3 of them and these fish were absolute animals, it took them about 2/3 days and they just attacked each other until there was only 1 left in my tank and then the last one decided to take on everything else in the tank and eventually come to its end when it started on my very large Red Terror female who had just laid eggs so the Ornatus died very quickly but I have never seen anything like it the way these 3 fish acted toward each other. Ill find the photo I had of one ( it probably will end up being something different )

 

[RealCrix220]

This was the last one after the other 2 were killed off

 

[M075]

Well in my opinion grabbing a small dog from a beach, when its not even in the water (they knew there was big catfish there so didnt let the dog in the water) is pretty damn impressive and aggressive lol.

If it was in the water in its territory by its nest id understand its just defending, but just grabbing it off the beach is next level.

Also read some rumors about some smaller children being taken by wels, i believe one of the stories was in England and was talking about a possible 6 to 8 meter long monster, not sure about how true the stories are but it doesnt seem impossible to me.

Anyways super cool fish, love their looks

 

[Simonas]

I've kept all kinds of predatory fish but the most aggressive fish I have kept for down right meanness is asian arowanas.

Mine and the last one I had have made a point of just turning on certain fish and when they do they wont relent until its dead and you can see the intent in it when it does.

PITA it is

My little red tail barracuda is very aggressive too contstantly chasing a twice its size african knife fish

 

[Beani keeper]

On a small scale, Telmatochromis dhonti is one of if not the most aggressive cichlids. We use to keep and breed them. Awesome little cichlids. Then i'd say 5 star General cichlids. Bigger cichlids their is too many to list. Trimac's, beani, Jaguars, Freddy's, Red Devils, Red Side cichlids, Grammodes, buttikofferi just to name a few.

 

[jjohnwm]

Some of our "more experienced"...i.e. older...members may remember a time in the distant past when Oscars were spoken of in hushed whispers as the Bad Boys of the aquarium hobby. They were big and mean and scary and...and...well, obviously they were the same big goofy puppy dogs then that they are now, but the "I keep tough fish!" crowd needed a poster child and Oscars were it.

 

[tlindsey]

Some of our "more experienced"...i.e. older...members may remember a time in the distant past when Oscars were spoken of in hushed whispers as the Bad Boys of the aquarium hobby. They were big and mean and scary and...and...well, obviously they were the same big goofy puppy dogs then that they are now, but the "I keep tough fish!" crowd needed a poster child and Oscars were it.

I definitely remember those days

 

[tlindsey]

I definitely remember those days

jjohnwm back in those days the oscars were wc that could have something to do with the aggression of some that were kept.