I don't common name If I can help it. I have P. phenochilus with P. milomo and they don't even notice eachother. The P. milomo does get after the P. electras I have, both of them - the makonde version and the deep water version. The P. phenochilus is probalby 4th in rank out of 30 and doesn't bother anyone and no one bothers him, they're really nice fish.