Cichlids that can go with Firemouth Cichlids are: Convict Cichlids: These are similar in size and temperament to Firemouths and are known to form pairs with the cichlids in the same environment. Jack Dempsey Cichlids: These fish are slightly larger than Firemouths, but they are also relatively peaceful and can be kept together in a community tank. Oscar Cichlids: Oscars are larger than Firemouth Cichlids, but they are also peaceful and can be kept with Firemouths as long as there is enough space in the tank.