Just came upon one of these at a LFS...I was very tempted but even the knowledgeable staff weren't 100% sure on temperament. From what I'm reading the whole family dosen't get very large (more than 10") but there is next to nothing out there on the temperament. Of course they will eat small fish, but does anyone know if they tend to be bullies? Would severums and the like be compatible? There really isn't much on the net about them..