Parker is right about the Gill Nets being selective. They are selective about fish size.

For instance, if a guy is fishing 6 inch mesh that will do fine for most Coho and steelhead, but the small ones will swim right through and the big ones will mostly bounce out. And as far as Kings go they fall in with the latter most of them bouncing out.

Now 8 inch mesh is good for Kings but accept for the Big Coho and Steelhead most of theese guys will swim right through it.

I know this stuff because I talk to theese fisherman all the time, and ive actually seen the Kings and bigger steelhead just bounce right out of the nett.