Here a link for more information on tagged fish, another link for the tag recovery form and another for drop off locations. I keep the forms in my cleaning bucket with a tape measure and scale and some small zip locks. Fill out the form, put it in a small ziplock and then put it and the head in a bigger ziplock and freeze it till you can drop it off. The small zip lock keeps the form from getting bloody. Those with adipose clips are the ones with micro tags in their snout. We usually get 10-15 a season. Back when they tagged the steelies on the St Joe river, we would rack up 20+ a year. The DNR sends a letter with a free lure for the salmon and steelies that are tagged. Maybe browns too but I've never caught a tagged brown trout. We have got fish off St Joe that were planted at Oscoda. It's interested to learn where the ones we catch came from. More info: http://www.michigan.gov/dnr/0,1607,7-153-10364_52259_48361-180626--,00.html Tag Recovery Form: http://www.michigan.gov/documents/coded_wire_tag_form-PR8550_35853_7.pdf Drop off locations: http://www.michigan.gov/documents/coded-wire-tag-drop-sites-July-2006_165267_7.pdf