ropefish tend to be peaceful but will eat what fits in their mouth. Mine hasnt bothered any of the other fish,(senegals, ompok, bgk). He goes nuts for earthworms and aggressively performs "death rolls" and shoots across the tank hitting everything when he gets a big worm. I have heard they are quite social. I bought another rope for the one I already had, but when they were introduced, it was quite a fight. Never saw aggression from ropes before but the big one would not stop attacking the new guy. and by big one, i mean maybe 2" bigger. They are now seperated and are doing very well in quite different conditions. one at 77F and the other at 86F