They are a malawi cichlid and should only be kept with other malawi's,the species is not aggressive (or so my trusty book says) but as with other large cichlids it is best to only keep them with other cichlids or large fish that are capable of looking after themselves.
They also get quite big,around 10" and need to be kept in small schools so a large tank would be required.
Your not having much luck choosing your fish are you Tek,may i suggest looking at some of the Apistiogramma species of dwarf cichlids,have nice colouring stay small and are suitable for even peaceful communities.