Pickerel was what flashed through my mind; although I haven't seen any around here I guess they do exist. I suppose it could have been something in its mouth; as I said, I only saw it briefly. I thought maybe I was looking at buggy eyes sticking out, but in my memory they were more square than rounded. Happened too fast to note any colors, and the water wasn't real clear; as I remember it was an even color - no spots or stripes etc..