Back in Minnestota, on some of the tributaries to Lake Superior, I have observed steelhead stopping at falls. Then they would start bobbing straight up with their heads out of the water, as if looking the falls over. I have seen this behavior several times, and I assumed they were checking out the route they wanted to take. Made sense to me at the time, and never gave it more thought. After the bobbing procedure would stop, then the fish would start running the falls. Smart? Maybe.
Catarafter