Fish do have a memory, although not at developed as humans.
It works along the same lines as how they react when you first approach the water....they flee! It's been imprinted from generation to generation that lumbering shapes on the shoreline are USUALLY a bad thing.
The same argument can probably be made regarding a particular spot, if it is fished year after year and the retuirning fish had been there in prior years, then it is possible.
I recall hearing of a study that found that some trout had learned to "associate" the color red (on a lure) with a negative experience, and stopped hitting that color lure altogether.
It may be a little far fetched, but in this day and age, I'm willing to give it a little credibility.
Now if I could only stop those darn squirrels from digging up my garden, looking for nuts they didn't bury I'd be fine!
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