Yellowfin don’t come to you. You build the slick, and the slick pulls them up.
Chunking is patience dressed up as a technique — cut bait into uniform pieces, feed a steady drift of chunks off the stern, and let scent and current do the work that trolling can’t. It’s the technique that turns an empty stretch of blue water into a chum-slick boil of feeding fish, often hours after you’ve anchored up or set a drift.
Building the Slick
Cut butterfish, sardines, or menhaden into uniform half-inch to inch chunks — consistency matters more than size. A slick with mixed chunk sizes teaches fish that the big pieces are the ones worth grabbing, which means your hook bait (which should be a full or half chunk, not a sliver) gets ignored in favor of free meals.
Feed chunks at a steady rate — roughly one small handful every 30-60 seconds — rather than dumping. The goal is a continuous scent trail down-current, not a single burst that disperses. Too slow and the slick never builds enough draw; too fast and you’re feeding the fish for free with nothing left for the hook.
The Rig
This is where you can go lighter than trolling gear. 30-50lb spinning or conventional tackle with Power Pro braid as backing to a 15-20ft topshot of fluorocarbon leader — 40-60lb test depending on water clarity and pressure. Circle hook, sized to match your chunk bait, no swivel or hardware above the hook that a wary yellowfin can detect.
Reading the Slick
Watch the chunks, not just the rod tips. When free-floating chunks stop making it more than a few feet before disappearing, fish have moved up in the water column and are actively feeding — that’s when you put a hook bait in without added weight and let it drift naturally with the current, same speed as the chum around it.
If chunks are making it out of sight without a take, either the fish are deeper than your slick is reaching or they haven’t found the slick yet. Give a fresh drift at least 45 minutes to develop before you decide it’s dead and move.
What Kills This Rig
Weighting the hook bait. A weighted bait sinks and swings differently than a free-drifting chunk — a pressured yellowfin picks up on the difference immediately.
Visible hardware. Swivels, snaps, or heavy crimps above the leader spook fish that have been chunked at before. Go bare hook to leader wherever you can.
Chunking too fast on a slow drift. Match your chunk rate to your drift speed — on a slow drift, you don’t need to feed as often to maintain the slick.
No hedging on bait quality — fresh-cut, oily bait builds a slick three times faster than thawed-out, dried-up chunks from the bottom of the cooler.