Swedish hook/pike hook/whatever, I bet it's these big curvy ones you're after. They're available but you have to keep looking around. We used to use them with big smelts or herrings or tullibes. The fish would take the bait sideways and carry it off, then spit it out and swim around and take it headfirst, and when it started moving again you set the hook. when the hook comes out between the eyes they're all keepers!
IMO a better way (provided you're keeping the fish) is to rig a 10" or so tullibe with a treble coming out the mouth and a treble just below the belly (all rigged up with wire leaders). You have to slash the swim bladder so they don't float. The active pike will get caught when they hammer the bait sideways, and the inactive ones will hook themselves by coming up and 'tasting' around the mouth of the still bait.
