Aulonocara sp. Stuartgranti Maleri (sunshine) is what it looks more like to me -I have one that looks the same as yours. Then again Sunshines vary alot. I would go with this simply because I have one and I order it from south FL as this fish. So I would assume thats what it is. Some seem to be dull in color and others extremely bright. Then again I ve seen others that look like this also. Ontop of that I think I am color blind, So dont take my word for it.
Aulonocara jacobfriebergi (Lemon Jake) or Aulonocara Baenschi. It looks more like a lemon jake to me only b/c it looks like a juvie lemon jake I used to have. It also looks very similar to a cross breed I have bewteen a maleri and jacob. I said baenschi as a second guess becuase the colors of both species look very similar when they are young (or at least to me they do). so its a possibility.