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Marie, I think you have yourself a little mixed up? There is nothing about pearl ginrin that is similar to matsunosku gin. Not related to each other at all except to say they are both scale conditions involving silver in scales and that they line up in a row. But the lining up of all these glistening ginrin type scales is required and genetically typical. Only old Niigata gin is 'wild' and random.
Pearl , of course, is a single pearl shaped dot of silver on each scale. Matsunosuke gin is a full scale ( yamakoshi gin) in a single row or strip, typically located on peduncle or off shoulder area. And it is not in the required double rows and symetrical to be considered a ginrin fish. In fact, if it was not a trade name gin and being associated with silken skin, it would be a demerit! It is really not meant to be admired for being gin but rather recognized as an accent to silken skin.
Pearl however, is a ginrin type and is found in two or three balanced/symmetrical rows on the dorsal/above midline area of the body. You are right, it is subtle on most specimens but a good one is impressive.
Hope this helps and doesn't offend-- JR
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