Probably short term, but not for life (by life I mean the Trimacs life... you're pretty much assured it's a life sentence for the Severums)do you think the trimec could be housed with a couple severums. where would i go about finding a trimec, tangled up in cichlids my only bet.
When you say mean, you mean towards other fish? or towards you? Most parachromis will be mean to other fish but kind of just float around and ignore you. If you want a fish that looks like it's trying to kill you, i'd agree amphilophus is the way to go. Trimacs are pretty awesome, and istlanum is one of my favorites. Some of the Vieja's are also pretty great in that regard- zonatus, argentae, guttalatum to name a few. If I wanted a large single fish for a 125 I would probably go vieja.
Yeah they grow very very fast, wish I could add one to my tank but it is too small with the current fish I haveI have one of these. They grow like wildfire and are straight *******s.