hmmmm...too bad they don't last longer than a year ... guess that's why you try to tag as many as you can then eh?! wow...so you "tag" them right on their dorsal fin ... how difficult that must be! and great whites! how many guys does it take to do this? how do you "catch" them so that you can do this? or can you actually "shoot" it on the fin somehow? seems dangerous yet exciting! what kind of information are you tracking anyway? I sometimes wish I knew about all these different venture careers when I was in school......would've chosen a different path for sure! but at least the rest of us here can live vicariously through you!