Good questions , wish I had the friggin answers.The two basic things that spring to mind are:
1. does the colour penetrate far enough into the water for a fish to be able to see it; and
2. can the fish actually see that colour anyway?
No 1 has already been done to death in the thread " a technical approach to barramundi fishing" (god rest its soul).
No 2 has only been looked at in relation to barramundi eyes 'cos a lot of research has gone into determining barramundi biology. So we know about that.
However, what other types of fish can we look at to check out their eyes?
There are only 3 primary colours. Blue, green and red. ALL other colours are varying amounts of blue, green and red mixed together (even white is such a mixture).
Barramundi have 3 colour receptors (called cones) so can see a wide range of colours. Forget about the water for the moment. We covered that previously.
What about US bass? How many types of different colour receptors/cones are contained in a bass eye?
There are 2 different types of colour receptors. A red and a green one. The main one is red and the other is green. That's it. They can't see blue.
They have no receptor for the colour blue so why on earth would anybody be fishing for l/m bass in the US with a blue lure? They can't see blue so any attraction of the lure for bass is definitely not the blue colour. Its most probably the lure vibration action hitting the lateral line that's doing the job and not the colour.
The colour red is especially catered for in a L/M bass eye and THAT colour happens to be the one that penetrates dirty/murky water better than any other colour.
Do we thinks it's mere coincidence?
What about pike or other species? I don't know how their eyes have evolved. Anybody got any info on pike eyes.
What about Aus species like jew, bream, flathead?
Any ideas out there?
If you were going for a driver's licence and an eye test showed that you were colour blind. That you couldn't see the colour red. Reckon you'd get one?
Shawn