Very interesting, thanks for the response. Absolutely beautiful fishMine have not been overly aggressive as of yet in the community setting, although they do hold their own.
I have 5, the smallest is @ 3", largest @ 5"+, they are housed is 150 gal with 5 similar sized Guianacara sp, 2 belly crawler pike cichlids, and Acarichthys heckelli.
When they were juvies in a 50 gal, they were very aggressive with each other, until I added the (at that time) larger Guianacara, the Guianacara addition changed their attitude almost immediately.