Yes M. Aurautus. They have a mean disposition. The dominant male will turn dark brown and the females and sub dominant males will remain yellow. Lots of little hiding spots are a must. I am not sure how it will do with the firemouths; my main concern would be that the dietary needs are alot different. Mbuna species prefer a low protein diet with lots of vegetable. I feed mine 100% spirulina. They are prone to bloat. They are a great fish and full of personality..they are the "bad boys of the mbuna". enjoy.