What kind of cichlid was that? Also, I currently have the Cuban and Oscar in my 135 gallon with the Vieja Synspila. Overall the Vieja thinks she's the boss of the tank, but the Oscar doesn't tolerate that at all. The Cuban to me is more of a threat than both those cichlids combined, but so far I finally have a tank established after a year. No fatalities except for one last year, but I sold the ones who were all bark, but no bite.