
Cod thumb or perhaps cod hand, either way Murray Cod have very sharp teeth.
If I had a dollar for every lure we have retrieved from the Murray River covered in teeth marks and sporting a short length of mono or braided line, I could possibly retire. To the uninitiated, it’s a great find but it is also a hard luck story of the one that got away. Contrary to popular belief Murray cod have teeth, and while they are not of the style that sharks possess, they are sharp nonetheless. These teeth are like small fine needles, rows and rows of them curved back in a fashion that is designed for grasping and holding baitfish and other items of prey. If you put your hand in their mouth to remove a hook, you will quickly find out that they are also very effective at removing skin. These injuries are often referred to as cod thumb, and are a painful trophy for he or she who has caught a fish. When a large cod inhales a bait or lure, they instinctively throw their head from side to side during the fight. This action is similar to a rasp working across your line and without the use of a heavy mono leader, in most cases the line will part. In time, the fish will spit the lure out and it will float to the surface covered in teeth marks and sporting a short length of line. It’s a revolving tale of cod fishing woe that can be fixed simply by learning how to rig a mono leader.
In fact when targeting any big fish be it Murray cod, Barramundi, kingfish etc it is advisable to use a mono leader. Leader materials are many; Fluorocarbon has been touted in recent times as the be all and end all of leader materials. This is possibly true in lighter gauges when targeting bream, bass and other smaller fishes. When you begin to run leaders 50lb and above many Fluorocarbons will not meld well when tied onto the main line. They display a memory that will often see them spring back from the knot. Softer materials form far better knots that not only pull up tight but also run through the guides more smoothly when casting. Many anglers don’t run a leader simply because they are unsure how to tie one. A simple answer to this problem is to drop into your local tackle shop and get them to give you a demo. There are also a number of books available on this subject with Geoff Wilson’s Knots and Rigs providing several clear step-by-step versions of the leader knot. Next time you have the good fortune to find the gnarled up lure with the short length of line you can fish comfortably in the knowledge that running a leader is one less way to loose a fish.