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Hard to say from this picture, everyone is saying male because that white spot looks like a gonopore but the shape of the furrow line and angle of the book lungs looks female.
From this picture I'd have to say male, but I'd like to see another before saying 100%
@spodermin I think it would be a different color at this size if it were male. It would have been light brown. It is also really skinny right now if that plays any part in sexing in visibility and such
@Kaden Alexander it sounds to me like the males only become lighter after ultimate molt. Skinny means more likely male also as males of pretty much any species are leggier
