Hanako koi fish was the longest lived koi fish in the world as the Legends said. Her age was calculated from her scales (this scientific calculation method is valid until now).
Scales of fish have microscopic areas which shows the growing of the fish like it is in case of tree annual rings. The fish eats more in summer and less in winter which reflects in the size of scales.
It is not so easy to count them you have to use a professional microscope other case it is impossible to see all of the scales. They are extremly small.
Her scales were analyzed under a light microscope by Professor Masayoshi Hiro. The analyses took about two months to get reliable result.
3d wooden brain teasers for you to try via OMG Facts http://feedproxy.google.com/~r/omg-facts/WpAq/~3/aAmzmYrcPQE/59575
3d wooden brain teasers for you to try from Net Sauce http://netsauce.blogspot.com/2013/11/koi-fish-have-been-known-to-live-up-to.html
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