There's a lot of content in this article but for my money they've buried the lede.<p>> Even more startling results were obtained with experiments with a dead trout. It was tethered on a line to an object in flowing water and even though it was dead, it still adopted a swaying movement in the vortex street and was actually drawn upstream!<p>Vid or a dead fish swimming upstream (not linked in the article!): <a href="https://www.youtube.com/watch?v=_ZBWnhzYvts" rel="nofollow">https://www.youtube.com/watch?v=_ZBWnhzYvts</a>