I can not contribute to the question of determination – but I agree in the suggestion to wait a little while. I think it can already be seen that there are coloured bands in dorsal and anal fin beginning to develop (especially in the last photo of post 3428), and even the caudal fin (picture in post 3430) shows a hint of another colour band occurring.
Whatever they are – to me they are extremely beautiful, even now while not showing full colouration!