Morning All
just to re-affirm what has been mentioned earlier.
Generally a very peaceful fish, but you do get some real glass bangers

BUT its generally evident when their pretty young, and they grow out of it, if your willing to give it a few years.
My 10" green male (minus tail, naturally

) was a real killer, but in the last few months, hes relaxed.
One thing to remember is, that with all cichlids, they have great memories. So if they take a dislike to a fish when young, chances are they'll never forget it. (mine hates plecos and clown loaches, but is fine with golden band loaches, whip tail cats and guppies)
Great fish though, big puppy dogs.
Craggy