It is a Dempsey. I have a male and a female dempsey as well as a pair of GT, a single female jaguar,what i've learned to be a Salvini, a Pleco, and a featherfin synadontis. The Fish Store that I deal with, claims they are all south american ciclids of similar temperment so it was ok. They've been in my 120 for near a year now, with no real trouble. (a couple nipped fins when spawnning occurs, but thats it)