What do you think is the most aggressive fish?

[Bottomfeeder]

ive heard doviis have been known to shred large plecos.

i wouldnt risk it.
midas and rd's are almost always nasty.
managuense are too, as are fh's and trimacs.

from what ive heard, Mangrove Jacks, AKA Mangrove Red Snapper, are vicious too.

 

[floater33]

my swarming group of giant danio's almost always consume all the flakes before any of my peacocks even have a chance

 

[groovitudedude]

mbu pufferfish

You obviously have never kept a Mbu (or a Fahaka for that matter).

+1 on the Fahaka. Mbu's can be kept with other fish. At least you have a better chance at keeping Mbu's with other fish.
A Fahaka you have about a 99% chance that it will be a killer. Absolutely no tankmates.

Great point.

I think it depends on the individual fish. Some fahakas do tolerate tankmates, but it is very, VERY unlikely.

 

[niblit]

one word puff...fahaka puff is pretty bad a undulated trigger is pretty bad too

 

[Mr.Kiet]

great white shark?

 

[nigaharu]

My Red Devil!

 

[Bottomfeeder]

i have yet to find a fish that can be kept with Western Mosquitofish

seriously...theyre beasts.

 

[LowCel]

Cutteri and Neets, for their size I don't know if anything comes close.

 

[Lepisosteus platyrhincus]

siersly yall? im talking evil and you all say puffers? you got a wierd outlook

 

[Charles d]

a betta cause there a chinse fighting fish right? lol