Dan, we've all been wrong plenty of times and that's no crime. It's not exactly certain why those dorsals get stubbed in the hatchery environment. I've heard that they get rubbed off on the concrete raceways, and that doesn't seem plausible to me either, and more recently I've heard that it might be a bacterial or infectious thing due to crowded conditions in the raceways. But what is known is that those dorsals tend to weird out on hatchery steehead, and its measurable and that's the reason for the dorsal height regulation. The state actually used to issue cards marking the height that anglers could put up against the dorsal to see if it was a hatchery or wild fish.