[noki]

Many thanks to both responders
I feared as much. What are the risks of them cross- breeding with saulosi?

They could breed with Saulosi, since they may be more dominant and may not have proper partners to breed with. Hybrids are not sure who to breed with, so they can readily breed with anyone somewhat close. Mbuna easily mix anyway in an aquarium, so you want fish that you can be certain that the fry are pure, if you are planning on saving fry.

Is that yellow one really that yellow?