Weird colour on cichlid?

[AmyKieran]

I have attached a few photos of my African cichlid. I can’t remember what breed this one is but it has started developing a blue on it’s underneath. When it opens it mouth slightly I believe I can see something red in its mouth but I’m not 100% sure.

Any ideas?

 

[Colin_T]

Just looks like a Pseudotropheus zebra colour mutation and it's showing off some blue colour. It's probably reaching sexual maturity and will want to breed. The males have yellow egg spots on the anal fin.