For the identification of macro-organisms, especially fish, visible implant tags having identification codes of fluorescent colorants are implanted into at least partially transparent tissue of the macro-organisms such that the visible implant tags are visible. The encoded information is obtained from the tags by measuring the spectrum of light emitted by the fluorescent colorants. The tagged fish need not be captured to read the tags. The information may be obtained through a significant depth of medium and also independently of the size of the tag or its orientation. Florescent dyes or, more preferably, fluorescent pigments may be used for the identification codes.
COLOR-ENCODED FLUORESCENT VISIBLE IMPLANT TAGS AND METHOD FOR IDENTIFICATION OF A MACRO-ORGANISM THEREWITH