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.