Moose, this is very interesting. I bet a lot could be learned if fish could be studied from below from one season to the next. I bet we would be surprised at fish behaviors on that level. And even more surprised about the fish's food selection with the changing of the seasons. I think a lot of people think crayfish are only near rocks along the shore. I caught a bass a few years ago and I cut it's stomach's open to see what it was eating, and to my surprise, it was full of hardshelled, bug-looking worms of which I have never seen before. So, you just never know what is on the lake floors which could be a very attractive food source that we don't have any idea it exsist. It is always good to see crayfish in our waters because it says the water is in good condition.