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http://blog.oregonlive.com/breakingnews/2008/05/big_ball_of_columbia_river_stu.htmlBig ball of sturgeon in Columbia River baffles experts
...The mountain of white sturgeon contained around 60,000 fish, according to a rough estimate by Michael Parsley, a research fisheries biologist with the U.S.
...The lingering question is: What were all the fish doing there?