Re: NANFA-- collecting at night

Bruce Stallsmith (
Wed, 12 Jul 2000 20:17:29 EDT

Red filtered light should be virtually invisible to fish, since red light is
largely extinguished in even very clear water; water molecules absorb light
in the red wavelengths so that red light can't penetrate more than about a
half meter down. Blue and green light is more energetic, and travels much
further through water. This is why underwater appears blue/green when diving
(not counting mud, or peat, or other additions to water).

--Bruce Stallsmith
Huntsville, AL

>Which leads me to ask if fish can see red filtered light? Perhaps
>with just a red filtered light might be more productive.
>Chuck Church
>Indianapolis, Indiana USA

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