Offshore Leader Systems

Canyon fishing is really heating up and a lot of newcomers are heading offshore to get in on the action. One of the key components for successfully pursing tuna and billfish is the leader system and keeping it simple is the way to go. The system I recommend starts with two knots that should be in every offshore angler’s bag of trick and works equally well on any pound class tackle.

Start by creating a double line with the terminal end of the running line using a Bimini Twist. The double line acts as a safety feature when you bring a large fish close to the boat, leader it then gaffed or release it. It’s insurance incase a fish chafes the line or even breaks one of the two legs of the double. It’s saved the bacon many times for me.

For most instances I like the double line to be about 10 feet long, but you can make it longer or shorter if you desire. Then tie a high quality ball bearing swivel to the terminal end of the loop using an offshore swivel knot.

Next comes the leader, which will attach to the double line at the swivel and the strength and length will vary with the application. Each lure or rigged bait will have its own leader. I use Hi-Seas 100% Fluorocarbon in 50 to 130 lb test for rigged ballyhoo because the trolling speed with baits is slower than with lures so the fish get a better look at them and any telltale indication of something not looking just right can be a turn off. Heavy mono leaders are stiff and too visible, hence leaders of lighter testing fluorocarbon.

For lures I make leaders using Grand Slam or Quattro Plus monofilament leader material in 150 to 400 lb test depending on the size of the lure, its swimming action and the fish it is most likely to attract. Lures for blue marlin or bigeye tuna are rigged on heavier leaders than the smaller lures I use to target longfin or yellowfin tuna. If you worry about your leader system being approved for IGFA record catches then keep in mind that you can run a combined double line and leader up to 20 feet up to 20-pound class tackle and up to 30 feet in 30-pound class and heavier.

For chunking tuna day or night use fluorocarbon leaders and have hooks rigged and ready on 30, 50, 80 and 100-lb test so you can start heavy and switch down in thickness if the fish are finicky. Chunking leaders are usually no more than six feet long with an AFW Mighty Mini Crane Swivel at the opposite end from the hook.

With these basic leader systems you can be ready to switch from one technique to another at a moments notice using the same rods. Practice your knots so you’re sure to have them right and go fishing.

Caputi’s Blog Tip:

Circle hooks are your best bet for chunking tuna. I use non-offset circle hooks only usually in size 7/0. Just remember when a fish takes your bait DO NOT try and jerk set the hook. Just slide the drag lever forward and let the line come tight. The hook does the rest.