About 7. Among Parachromis, P. loisellei is somewhere in the middle in terms of temperament. In my experience (I have both species), more aggressive than friedrichsthalli and about the same as managuensis. They tend to pick fights and chase, but I've seen my 6" male strike at the body of other fish and bite scales off. Definitely not as placid as people say they are. Friedrichsthalli are, in my experience, the most docile Parachromis, not loisellei.