Wow guys, thank you all so much for your advice. They are in a 4ftX2ftX2ft tank, with another pair of festae who are the less dominant pair. The female in the pic has never showed any bars at all, even when she was fighting with the the other female in the tank, to claim her place as the dominant female.
I searched high and low for these fish, found someone who stocked them in their shop, and paid top $$$ to have them shipped to me. But I guess it's a risk that I took, I didn't look into them any further, and took the first ones I came across. I would be lying if I said that I didn't feel a little disappointed, but it is a lesson that I have learnt from!
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