Seaguar Holding 50th Anniversary Angler Photo Contest

In 2021, Seaguar ®, the world leader in fluorocarbon line and leader material, is marking the 50th anniversary of its founding and the invention of fluorocarbon fishing line with a fun angler photo contest. To celebrate, the company has created the “50 Big Ones” photo promotion where anglers are invited to submit their favorite fish photo taken from 1971-2021.

When visiting the contest site at, anglers can also vote on photos they believe deserve special recognition.

Fifty winners will receive a 50th Anniversary commemorative Leader Spool Management Bag filled with three spools of Gold Label Leader. The contest runs from February 1, 2021 through May 31, 2021. It is open to residents of the U.S., aged 18 years and older. To enter the contest or read the complete contest rules, visit



In 1966, two employees of Kureha, a Japan-based chemical company and parent company of Seaguar, noticed that the attributes of fluorocarbon were ideally suited to fishing line. Nylon monofilament dominated the market at that time, but the two catalogued fluorocarbon’s advantages versus mono, including absorbing less water, impervious to UV rays, high-density and nearly invisible underwater. Their hunch proved true… that fluorocarbon would revolutionize fishing line and so the two men applied for a patent, which was granted and registered in 1969.

Like most breakthroughs, it took several years of trial and error… of success and failures before a product would be ready to market. The company had mastered the process of extracting only the highest-caliber fluorocarbon crystal from which the leader and line resin is derived, but it would be several years, however, before they succeeded in extruding the resin properly to create fluorocarbon fishing line that met the performance traits desired. During that time several experiments and tests were conducted along the way to verify the properties and benefits of fluorocarbon vs. other fishing line products. These milestones kept the project alive and advancing.

Finally, in 1971 with manufacturing quality standards established and production technology and equipment put in place, a new factory began extrusion and producing Seaguar Fluorocarbon Fishing Line. It was first introduced to the Japanese market and launched to USA saltwater anglers in the early 1980s. Anglers were impressed by its properties, including less visibility underwater and the fact that it sinks faster, allowing baits to get in the strike zone faster.



Since then, Seaguar has innovated and advanced the quality of its offerings in many ways. One of the first improvements over the 1970s version of fluorocarbon fishing line was how to improve knot strength for Leader and Tippet applications. Seaguar engineers decided it would be quite difficult to improve on knot strength without changing the structure of the line and they did not want to compromise the benefits that had been achieved thus far. The solution took shape in a new revolutionary process called double structure. This creates a line comprised of two different resins but still results in a single structure, impossible to separate, made exclusively with 100% Seaguar-produced fluorocarbon resin and Seaguar-managed extrusion processes, with all the same qualities and more of Seaguar’s single structure line.

The only problem with the double structure concept was that the two-resin formulation and structure made extrusion, a difficult process, much more difficult. It would not be until 1983, with the contribution of an improved extrusion process, that Seaguar introduced double structure fluorocarbon lines and leaders that now include Gold Label, Fluoro Premierâ„¢ and Blue Label leader material as well as Tatsu ® mainline. Seaguar’s Double Structure Technology provides a core 100% Seaguar fluorocarbon resin that is harder and an outer 100% Seaguar fluorocarbon resin that is softer for to make the line soft and supple and to allow knots to cinch easily.

The next focus in Fluorocarbon advancement was improvement in abrasion resistance. The R&D Team championed the task and, with the expertise earned through so many previous years spent developing formulations, succeeded in creating a new fluorocarbon resin that would maintain current performance expectations yet better withstand heavy cover. The result was the introduction of AbrazX ®, a line designed for heavy cover and lab tested to be twice as abrasion resistant as competing fluorocarbon brands.

Seaguar continues to create products that make a difference to anglers all over the world. 

And since it is the only fluorocarbon company that makes its own fluoro resins and controls the process from start to finish, it is uniquely able to develop lines with high-performance features to help anglers catch more fish.