I've never had a small one confirmed Suriname in my hands. If I go by the photos on MFK, I'd say the OP's fish is not Suriname. It resembles more my Peru pair when they were small.
Anyhow, here a link to the thread I hoped to be the main thread for the discussions of the piraiba regional differences or the lack thereof. https://www.monsterfishkeepers.com/...zil-are-there-reliable-id-differences.711007/
IDK why OP images are not visible in the post, so I will repost them here for everyone's convenience: (I reduced the pixels 10x, because the files are needlessly enormous)
View attachment 15971232551801450636672367328364.jpg
View attachment 15971236271046960029813742535326.jpg
Anyhow, here a link to the thread I hoped to be the main thread for the discussions of the piraiba regional differences or the lack thereof. https://www.monsterfishkeepers.com/...zil-are-there-reliable-id-differences.711007/
IDK why OP images are not visible in the post, so I will repost them here for everyone's convenience: (I reduced the pixels 10x, because the files are needlessly enormous)
View attachment 15971232551801450636672367328364.jpg
View attachment 15971236271046960029813742535326.jpg
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