Can someone please I.D this fish

[Big Derby]

I'm at work now but I will take a few photos when I get home tonight.

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[Big Derby]

Sorry about the poor quality photo's, he would not pose for a second. He seems to have settled in nicely, very calm and happy fish.

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[Gillie]

How big is this fish? It looks young and awfully thin, it may be easier to possibly id after it fills out a bit. I do agree that it looks a bit like a Geo but the body shape and caudal length are really off putting. I've only seen G. altifrons offered in albino form and heard of G. sp. Tapajos albino forms being around. It really doesn't look like either species, but again it looks really thin.