The Whale and the Waterfall

I spent some time photographing some of the old factories in Springfield.  Apparently water power was used in the old days for power, and in fact, there is apparently a small electric generating plant downriver that still operates.  I think that this waterfall is part of the water power arrangement.  Anyhow, I was prowling around at the end of the day, and saw this rock that appeared to be to be some kind of large fish swimming upstream.  OK, so I have a vivid imagination.  I mean, it does have two eyes...