Invisibility of red makes sense because there's some real science behind that. I'm also a scuba diver and I used to get into underwater videography. Anyone who's taken underwater pictures will tell you that the reds start disappearing at about 15 feet (depends on clarity). Those wavelengths of visible light that allow us to see red are more affected when water is the medium.

Any biologists on this board that know about pink WRT to salmonoids? I'm wondering if there's some sort of rods/cones issue. I'm guessing that fish can't see color (dunno). Perhaps red, although it disappears still provides contrast, while pink is more middle of the road?

If there is science to it, then I'm still left wondering why pink is such an effective lure color. Puzzled..

-Jim