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The reason for that is that you are a trichromat, you see all of the colours. But you are not a fish, which might ot might not see what you see. It depends on the lifestyle and habitat of the species.
Like flathead, the original subject. They operate in very shallow clear water and they are designed to do it. They are one of the few species with an eyelid to block out the overhead light. And if you dive you will know about Snells window, that bright light over your head, which actually is the sun and it subtends an angle of 97 degrees to your eye. Its size depends on the depth and flathead see it too, and in shallow water the view above them is about 6 inches across. So mostly they have the eye lid stopping overhead light and their eye looking horizontally into a tunnel of water as thick as the water depth, and since the water is relatively clear, or estuary like clear they can see anything that moves in that tunnel. Your feet and the bottom of boats, if you are in one. But they don't scare easily. Remember a flathead may well see all of the colours but in general action, form and flash is the most important criteria for flathead. The fly can be quite large and quite small. But it should be fishy. Cheers Max
PS.. Just thought I'd mention that flathead are just that, they have a flat head with the eyes on top, so they do not need to, nor can they see down. But they do have a wide area of binocular vision overhead. Stuck into the bottom, covered up so they are just a pair of eyes searching a tunnel of water all around them, they see all of the area around them, both sides at once, they are the ultimate predator. But overhead they are not looking at because its too bright for their eye.
In the ocean red is the first colour to go, orange,and violet, yellow and indigo green and then blue, but it depends on the water colour, as it gets greener the spectrum shifts to the green and in dirty water everything but red is gone at 1 metre. Not much point using colour in dirty water since the fish will have shifted to grey scale vision.
You need the "book" soon to be there. Max
Try different size Clousers in yellow and white tied with red thread on 3/0 hooks. It works in Central Queensland. If there is a headland around with a sand bottom try a fast sinking line with a Clouser along the bottom in deep water. Big flathead!
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