Neil,

There is a slightly shortened version of a reply I made a few years ago on the old version of these forums to be found here -
http://www.sexyloops.com/articles/wh...onidssee.shtml

As Midlander has hinted and as you will see from the above linked to piece, only juvenile trout and salmon have the ability to see into the UV part of the spectrum and this ability is no longer present in fish over two years old.


Dave.