Description:40 thousand dead fish have floated to the surface in Iowa waterways. The shovelnose Sturgeon fish are prized for their eggs which are sold as caviar, and the large number of dead Sturgeons contributes to an estimated 10 million dollar loss. There are so many dead fish that they are causing other problems for Midwest residents, like stopping up drains and causing power plants to be temporarily shut down. (1:03)