Good question - but largely unanswerable. I can spot 2 male Copadichromis borleyi 'Red Empress' with blue heads and red bodies, just above the bottom of the window and I suspect that brightest orange fishes are male 'Red zebra' Maylandia estherae (in which there may be some plain blue females in the mix too).
The blotched forms just cannot be identified here. I would expect some Labeotropheus are in there somewhere, plus some Melanochromis and Pseudotropheus species - and there are other possibilities too.
Yeah cichlids are always a pain to ID, especially with the existance of gender differences, hybrids, breedings forms and colour morphs.
I want to agree with both Copadichromis borleyi and Maylandia estherae, but neither of them are mentioned in the annual raports / stock lists that the zoo releases. Ofcourse they could have been added recently.