Hi I picked up a fish labelled v.melanurus I believe it is a paratheraps melanurus. I currently have it in with a school of silver dollars and 3 neoarius graeffei catfish. The paratheraps is showing a little aggression to the catfish but it's not to bad. Would you believe they are compatible with each other? The catfish are almost a 30cm long (the larger two, the smaller one is about 20cm). I believe the paratheraps is around 16-18cm long
