My top 3
1. Parachromis Managuensis - or - Jaguar
The meanest South/Central American Cichlid I have ever had. What a great fish awsome color and fun to watch, but mean as any fish I've raised.
2. Melanochromis auratus I think is the bad boy of the Aficans
3. IT's a toss up for third. Johanni, Kennyi, Chipokee, or Dogtooth are all fierce fighters.
Well thats my list
"D"