Not that I am aware of, but for the most part Severums are not aggressive. They can be housed with non aggressive fish and are fine. They also can be housed with all but the most aggressive of fish and hold their own. I had mine, at one time, in with Bolivian Rams, angels, and cory cats. I moved them when they decided to start eating my plants, into a tank with convicts, polleni, robertsoni, nicaraguense, and a green terror. They did well in both tanks.