CRS grading

As many people already know, CRS first born in Japan.  It was mutant of Beeshrimp from China.  A Japanese shrimp hobbiest Mr. Suzuki found red shrimp among 1000shrimp.  He successfuly bred the next 3 red shrimp among 3000.  After this foundation the shrimp passed to other breeders like Mr. Negishi, who's responsible for improving white color of the crystal red shrimp.  As crystal red shrimps are reformed, grading system were born based on the how much white color are on the shrimp.    Today the grading system is little different depend on country or breeder.

My personal grading system 2007

Grading system in Japan

Grading system in Korea

Grading system in Singapore

Grading system in America