Anyone know what this is?

[Boomerang]

Bought this guy last year but not sure what he is. The LFS also doesn't know what he is. He was in a tank with peacocks and haps at the store.
He was originally dark with yellow and is now all yellow. He has no stripes. Any ideas?

 

[duanes]

Looks like a hybrid from the Labidochromis caeruleus group, and some other mbuna type.
These hybrids are very common these days.

 

[james99]

I looks like atleast some yellow lab in him, it would be hard to tell what else.

 

[Gourami Swami]

Could definitely be a hybrid. Also, I believe Melanochromis Johanni start out yellow, then the males transition into blue coloration as they mature. Was the top picture taken before the bottom picture? Maybe the fish is a johanni transitioning into adult colors, looks much more blue than yellow in bottom pic to me.