Here's a good reason to have a commercial permit for fishing
http://www.nmfs.noaa.gov/pr/interactions/mmap/
incedental catch you say eh?

and it could be legal
hmmmm, get my comm permit, apply for this special permit, 1209, saltiga 6500 loaded with 65 lb braid, 60 lb leader, superglue knots, vmc 6x hooks, 20 to 25 lbs. of drag set, fight of a lifetime from the beach, then retribution. ahhhhh