Anyone who finds several or more dead fish in a lake or stream can help by reporting these fish die-offs, which happen occasionally and usually result from natural causes.
“It can be unsettling and concerning to find a number of dead fish,” said Tom Burri, limnology consultant with the Minnesota Department of Natural Resources (DNR) who deals with water quality issues related to fisheries. “We hope people will help us out by reporting dead fish right away so we can determine if an investigation is needed.”