Well, I don't know about the fish in water thing...doesn't seem real practical to me for every situation....Ok more for big rivers maybe where access to the beach is more easily obtained. I believe it to be good practice, don't get me wrong, but I just don't think it very practical to make it law. Hard for me to picture a guy looking for a clipped fin while keeping the fish in the water in the only landing spot which just happens to be swift water, or steep drop-off bank, especially if he fishes alone, unless the fish is so tired that its chances for survival are jeapordized. Kinda seems like cutting off your nose to spite your face to tire a fish out so you can get a good look, possibly a picture, and unhooking.

As far as net mesh size......great idea anytime.