We used to use those in NY for snagging salmon during the Lake Ontario run. It was perfectly legal 25 years ago, not so much now. Years later I would use those hooks as my "bird dog". I didn't have a bird dog, so I would take a fishing pole with me while duck hunting. Shoot a duck that was a little too far out, cast and snag for a "soft mouth" retrieve. LOL. They use grappling hook sized snag hooks to snag paddle fish in the Missouri and Yellowstone rivers of Montana for a catch and release fishery, it's wild!!!