thanks for the ID, how big is yours in that picture?
I know you seem to be going mantilla, but it still may be a marbled Motoro. Their paterns vary A LOT. It's freshwater.
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Def not marble, it is either a hybrid or a mantilla, some people believe mantilla are natural hybrids, I have imported some mantilla directly from brazil and they vary quite a bit but I would agree mantilla or hybrid.
you have pictures of those you've imported before?