A Scientific American short episode by the same title can be seen at the link below, scroll to the bottom of the page. http://www.pbs.org/saf/1306/video/watchonline.htm
Edit:-Thanks to Basil from Allcoast for passing along the link!

it was very inforomative.
Mike

I've seen this one before and read an article on the results of the taggings . There's another one about the Giant Bluefin tagging season off the Carolina's . A boat would hook up and call the tagging boat . The boat with the fish would pass the line via a tennis ball and the fish would be lip gaffed and brought aboard up a special ramp on the stern of the boat . They would put a seahose in the fishes mouth , cover it's eye ,do the measuring/sampling , and plant the electronic tag releasing the fish in good shape .