When working with Mohave tui chub my students and I have noticed that they are attracted to cooler water being fed into a pond of relatively warmer water. Since this species of chub does not swim very well "upstream" against a fairly swift current, if the current of the incoming water is significantly swift, say 50 gallons/min (gpm) coming out of a two inch pipe, the chub will hang back in the plume of cool water. After the flow is stopped, however, by turing off the pump to a well, the fish enjoying the plume of cool water will procede to swim up that plume into the two inch pipe in mass, getting themselves stuck in the process. Thus the title of this article, "Fish Don't Swim Backwards Very Well". If you want to know the rest of the story, leave a comment and an email. Good Day!
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