That's an amazing tale - thanks for sharing. I always thought it a bit ridiculous, given the effort salmon have to make to leap cascades. I know there are gravitational benefits to being small in some instances (falling from height, for example), but water is heavy, and a pee-stream is powerful. Of course I may just be trying to reassure myself. The bright red cow-arse worms in the Far Sump connection in Leviathan were pretty terrifying. I'm sure they had teeth.