Malawi cichlids: I think the orange ones may be female 'red' zebras, Maylandia estherae, the plain brown ones may be rusty cichlids, Iodotropheus sprengerae. It looks to me as if the 3 barred fishes may be different species, but I can't identify them.
I think zoos and aquariums ought to be much more careful and diligent in labelling confusing species like Malawis.
@MennoPebesma It's possible; wild male red zebras are usually plain blue, although there is a morph which is much paler, and 'red' males have been bred in aquaria, but I would expect to see eggspots in their anal fins.
