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