In surf fishing, espeically with lures, a "shock leader" is a heavier section of mono attached between the main line and the lure. The intent is to aborb the shock of the fish's hit.
In my experience a shock also has many other good advantages:
- It's an abrassion leader. Typically you're using anywhere from 40# to 60# mono as a the leader and as such it can usually take more rubbing against rocks etc. than the say 15-20# mono you're casting with.
- It's a grab leader. Having a heaviler section of mono at the front is much easier and safer on your hands to grab and pull than thinner casting line. Very helpful when trying to get a fish up the rocks.
- It's a bite off leader. While bass don't have teeth it does help prevent more toothy critters like blues from biting through the line (not as good as wire but far less spooky too).
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