Fireline Crystal

Your very welcome.

Moose1am

<< I guess that explains why I like to look deeper into the technical reasons of why fish do what they do. I don't mean to bore anyone with this information. It's just that I enjoy knowing the why things work and how they work.

Definitely not a boring read! I also check out the fisheries journals from time to time. Some good stuff to learn from those.

Andrew

First, not normally bored.....

Second, I love the research.

Third, let me add a thought to your hypothesis that the fish are positioning themselves below the fleas to see them. Perhaps the "seeing" is not a regular type vision, but more of a vision constructed by the input of several inputs of vibration, water displacement, and yes regluar sight.

To use this as a proven example of sight would be to say that filter feeders such as the shovel nosed cat fish only swims with its mouth open when the plankton is visible to it. I don't think you can say that.

Does the book discuss the biological build of the eye, or that of the brain, and the brain's ability to process inputs?

I'm not trying to argue, but I have one guy who is acknowledged as an expert who talks of fish disection and study, and an internet "friend"... yes a friend, who does a lot of great research on his own.

BTW, there is no doubt in my mind you have superior knowledge to me in the book study of this field. I am not questioning that. I am merely trying to reconcile two differing opinions.

Thanks again for the great research.

Tight lines and God Bless

Danny

PS, let's just be glad we are having the discussion here instead of on one of the other boards where others would jump in because of preconceived notions!! It's a shame folks can not discuss opposing views with an open mind.

Thanks guys.

Danny I agree with you that they use movement and yes vibrations to help them locate their prey. That lateral line is good for triangulating on waves created by things swimming in the water. Even those tiny daphnia will create pressure waves as they swim around in the water.

Not all fish have good eyesight. Some fish are blind. The cave fish that live in total darkness have lost their sight.

Other fish such as the Archer Fish can actually see things out of the water. Trout can also spot a fisherman walking along the bank. They can see out of the water pretty good.

Movement definitely helps the eyes see things. I know that I can see things better if they move especially in the dark. For example one night while I was watching TV and big spider was walking across the carpet between me in the lazy boy and the TV about 10ft away. I didn't know that thing was there until it moved. Another night I was up late and working on the computer in a dark room. The only light in the room came from the computer screen. I noticed something in my peripheral vision and it was a big spider that was crawling along the wall. So movement definitely helps me see things that I may not have seen if they didn't move.

If you deer hunt or rabbit hunt you know that it's easier to spot your prey when they move. If they stand still they blend into the background so well that they are hard to see.


Regards,

Moose1am