CWT are normally dissected from dead fish, however they can be benignly removed from shallow implants (Oven and Blankenship 1993 [Abstract]). Also, specific location (e.g., left cheek, right cheek, nape, origin of dorsal fin, etc.) of the implanted CWT, as determined by a Wand Detector, can provide a number of different "codes" (Tipping and Heinricher, 1993 [Abstract]).
VI Alpha tags can be read in either live or otherwise intact specimens. Fluorescence facilitates reading when tag has become obscured by tissue pigment.
VIE tags provide the same advantages as VI Alpha but are easier to read because of the simple color code.
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