Thanks.
I personally think it is just a fancy name that they use locally for a redder morph of cherry shrimp. Sort of like how we grade crystal red shrimp here according to their colour.
From the pictures I have seen, Sakura shrimps get redder and the entire shrimp is red (including the legs). The subject in the above pictures are less than 2hours in the tank.
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p.s. For those interested, the camera settings is in the EXIF data. The camera is a Canon 40D.