Greg, take a look at this link to view a skeleton.
http://www.infovisual.info/02/034_en.html

Your are basically trying to insert the tag through the "radial cartilage" or are you angling both forward and downward towards the "neural spines?"

Regardless of which one in both cases it seems its important to insert the needed past the "center" of the fish towards the opposite side to insure it catches correctly?

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