Oreochromis mossambicus

[Gudjon]

I might be getting my old Oreochromis mossambicus back
I gave him away when he was about 12", that was 6 months ago
The current owner doesn't want him anymore because he's turned evil and is attaching his sharks
When I kept him he shared a tank with my American cichlids and everything went well.
Are these guys aggresive? can he be kept with American cichlids?

I'll post pictures when I get him back

 

[HerCrenVie]

They aren't overly aggressive, definitely nowhere near the aggression level of Dovii. I'd be worried about your CA/SA cichlids attacking the tilapia instead, which they would consider an trespasser into "their" tank.

 

[croc 2-3]

Any time you introduce new fish into an established tank you should rearrange territories before placing new resident in so that none can bully the other. They will restablish new territories that the new fish can adjust to.