I have tagged over 1,000 sharks in the National Marine Fisheries Service program.
Totally free for participants.
They would provide feedback from BOTH the tagger as well as recapturer.
PLUS they hooked you up with a sweet embroidered hat.
Im not sure if they are still running this program, but it was great. Something like this would be absolutely great for swordies.
Here's the link:
http://na.nefsc.noaa.gov/sharks/