What is the meanest fish with the worst temperment you have ever kept?

[croc 2-3]

A gold severum?! lol come on a salvini could take him out. Put a red devil in with him he won't be so tough anymore.

I've kept severums with labiatus & cintrinellums before & the severums can hold their own. My meanest fish where a hemichromis species that wasn't really classified in the early 90's as all jewels were lumped together, a hemichromis fasciatus, & an asian red tail The asian red tail actually squared off with cichlids when then got near his/her cave.

 

[JoeFatFish]

I have kept many cichlids, and many just had the nastiest tempers, including RD's and Midas, but of all those, I had one midas, who I swear was crazy, he was a maniac, killer! I could not keep him in my 215, without beating ALL my fish up. separated him into a 100 with a male Trimac (mean guy), twice the size of the midas. The next moring, the Trimac or midas had busted down the divider, which I swore was on tight, and the Trimac was dead, torn to pieces, like if a piranah got to him! I loed thsat Trimac, and that brain damaged asassin killed him.

 

[BigJ]

I have one that smokes cigarettes and carries a switchblade.

 

[allvol]

black belt.

 

[catfishlover106]

my umbee's

 

[green_fox]

ive got a festivum whos killed 2 blood parrots that were 6"

 

[Cross127]

I have to say either my Salvini or my Barred Midas take the cake on badass fish. Although my Bleekeri is catching up quick.

 

[Aqua Sanctuary]

my little punk jack dempsy

 

[Devol]

My two year old RD is the meanest fish I have crossed. Will kill anything- even my hands and arms when cleaning. Four fish under his belt and all were twice his size. Relentless. Will not rest until he is the only moving thing in the tank.

 

[Umbra]

In terms of territorality I'd say Neolamprologus christyii - try a 5 inch fish taking up a 6 foot tank and not letting ANYTHING else live in there. Even plecos had their eyes picked out and were subsequently harassed to death.

In terms of just all out craziness, probably an old Distichodus sexfasciatus. Those things are mean, my lfs almost always have 10"+ returns that were destroying tankmates, and mine was no exception. At a tender 6", it was just picking at EVERYTHING in it's 180g. Nothing could swim by it without getting slammed. It got to the point where it had killed several fish, and every living fish in the tank had some sort of injury caused by this fish. I've heard black sharks are just as nasty, and the stories show as well.