Fish die-off in Brown Slough a mystery

"The next day, hundreds of shiner perch were found dead on the banks of Browns Slough. A week later, the state Department of Ecology and the Department of Fish and Wildlife say they are no closer to finding a cause. No samples were tested and no cause has been established — just a lot of finger-pointing in a heated email exchange in the hours following the find," according to an investigatin by the Skagit Valley Herald.