Does anyone know if Darwf Gourami's can be really agressive? I have a what I believe to be a serious bully in my tank and it has only been happening since I added the Gourami. I have had Harlequin Rasbora's go missing and turn up dead. All missing either part of their tail fin or all of it. I know my Serpea Tetra's use to be fin nippers when I first got them but they have since calmed down. Just didn't know if Darwf Gouramis could be really agressive when there is only 1 in the tank. The Harelquin's are the only ones being effected too. No body else in the tank is being harmed. Kind of sucks to keep loosing the Harlequin's as I was growing pretty fond of them. Any help on this would greatly be appreciated