Throw it back?
It happens enough to pose this question. You're trolling or casting when a smallish walleye grabs your lure. As you reel him towards your boat, one of those monster Canadian northerns emerges from the deep and grabs your fish. Off he swims with your walleye and your lure in his face. It's you're lucky day, however, because he gets himself hooked well enough so that you end up boating the pike. You place the big fish in your cooler and start dreaming of how great the trophy will look mounted in your den. Later that day, a DNR officer pulls up, sees your huge pike and asks how you caught him. Will the truth set you free or will the truth place you firmly in a pile of deep doo-doo? And in the name of ethical sportsmanship, should you have thrown the fish back?