There is a youtube video that I searched for a couple days ago to link to but could not find it.
It showed what looked like water coming out of about a 6" pipe and dropping about 3 to 5 feet to water. And sunfish of some sort swimming up the flowing stream of water to the pipe. Could not tell if any of them ever made it, but they were getting within inches of the pipe swimming up the falling stream of water.
And they were persistent about it.
