i thought so, yellow/blue color and black stripesCould it be a changing auratus? Sounds aggressive like one. The pic could be a poorly colored one in mid change? Females and sub adult males are yellow with black stripes adult males are blue with black stripes.
He is dominating in the tank (to smaller fishes than him)Is he beeing dominated by other fish?
A lot of non dominant Mbuna males try to look like a female so they are not being attacked by the alpha male
Finally last night he show his true identity hahaha...
and thats right my thought, he's johanii.
I will update the photos by the way.
