Morality varies from person to person and C&R mortality varies from species to species, by fishing methods and places fished, etc.

For feeding chinook in the Charlottes the mortality might be as high as 20-30% for mooching herring with standard hooks and as low as 5-10% trolling spoons or squid with single barbless hooks provided that they are minimally handled. Circle hooks may cut the mortality for mooching to about ½ to ¼ as much.

As to morality, you have to decide what is right for your own conscience. For me it's to fish long enough and often enough to put a desired amount of food on the table. For some it's immoral to kill any fish but ok to C&R to their hearts contentment. I know some who release every fish and limit their catching to 1 fish per day. We are all different in what is right for our selves and we must live with our own choices.

That should be worth a quarter if you have one.