A Severum is great to have,but some will usually chase others who they don't like apparently.My Severum has been chasing the Green Terror here and there,since I both had them in a 55 gallon,now they're moved to a 125 gallon,which I put the GT in first and the Severum still chases the GT around at times.So if you get a Severum,he or she may chase one of those fishes and leave the rest alone,also they can fight too,so you may expect the Severum to be the king of the tank(if you don't have the midas that is still).
