I wonder if we can infer some simple algorithm that might be encoded in the little fellow such that he produces this? Brent -------- Forwarded Message -------- https://www.youtube.com/watch?v=p1PID91sEW8 The thing that is remarkable is there is a high measure of spatial reasoning in this fish in order to do this. I would ordinarily consider a dog more intelligent than a fish, but as far as I can see dogs have almost no spatial reasoning. LC