Jack Dempsey Cichlid

These are youn specimens of an aquarium mutation, possibly with som hybridisation in their ancestry too.

That's interesting. What could they have been hybridized with @gentle lemur ?

They remind me of the 'blue acara' hybrids, which are solid blue, quite unlike the old aquarium favourite with the same common name (which is a wild species). I don't know the parent species involved, but I suspect that Nannacara anomala might be onw of them.