Cajun Line Red Lightnin' Mono, new leader idea? - Fly Fishing Forum
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Old 02-20-2003, 08:59 AM
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flyfisha1 flyfisha1 is offline
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Location: NYC, South Jersey, Eastern PA
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Cajun Line Red Lightnin' Mono, new leader idea?

As a marine scientist and avid fisherman, I subscribe to quite a few publications, one of them being Salt Water Sportsman. In the most recent issue, I saw an ad for a monofilament that's colored red. The manufacturer claims that the red coloration makes the line become virtually invisible at depth, due to the light filtering affect that seawater has, causing red wavelengths to be absorbed and refracted within the first few feet of the sea surface. Intrigued, I went to their website and found a short Quicktime video showing a pair of identical lures being waved around in a tank full of largemouth bass and catfish; one lure is tied up to "other brand" mono, while the other is tied to this red mono. From the video, I must say it's hard to see the red line. I started thinking about how this mono might be incorporated into a leader, or even a red sinking fly line for offshore fishing.
There are numerous aspects to light attenuation in seawater; one reason that many deepwater and nocturnal species have evolved to exhibit red coloration is that, at depth over 3 meters or so, no red light (emitted by the Sun) exists, and therefore these animals appear to be black or a similar dark color. At depths of 150 M or more, no light, other than that produced by bioluminescence, exists at all, which means that the coloration of the fish and invertebrates becomes largely irrelevant. This is why many of them are just plain silver, black, colorless, or off-white (some of these invertebrates are red or deep purple, also); they appear literally invisible unless illuminated with some light source that contains the wavelengths present in their tissue coloration. Red line, assuming that it contains no other pigments, should behave similarly and become quite invisible. I wonder what the comparison with fluorocarbon will end up being?
I'm going to order a few spools of this line, to see what the results are; at $5 per 300 yds., what can it hurt? It may very well be another advantage for those of us that routinely probe the depths with a fly looking for the next finned monster to strike.
Has anyone out there used this line, and what are your thoughts on the application to fly fishing?

Last edited by flyfisha1; 03-19-2003 at 09:04 PM.
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