Yellow Lab Cichlid Female. To reduce the chances of any aggression, keep yellow lab cichlids with a ratio of 1 male to 3 or 4 females, stock the tank heavily, and provide plenty of sight blocks in the form of rocks or wood. Male yellow lab cichlids are bigger than females.

I would not assume a smaller, less colorful fish is female. The yellow and white scales on the yellow fish make me think metriaclima.maybe the common estherae/lab hybrid? The female incubates the eggs in her mouth until they hatch in approximately three weeks.