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DSC_0324 | by USFWS Pacific
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Coded wire tags size 1 millimeter. Size comparison to a penny.


Coded wire tags are placed in the snout of some fingerling salmon. The coded wire tag has numbers laser etched on the tag.


When adult fish return , fish are checked for tag with metal detector. Information about the fish are taken (sex, length, species)and a section of the head removed for dissection of the tag at a later date.


When the tags are read, the information is placed in a data base that is available to numerous agencies.


You are free to use this image with the following photo credit : Ron Wong/USFWS

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Taken on June 22, 2011