Greg Sass discusses silver carp and the electric fish barrier In a January 9, 2009 article in the Milwaukee Journal Sentinel. The article focuses on the impediments to the electric barrier that is supposed to protect Lake Michigan from invasive species moving through the Chicago Sanitary and Ship Canal. Silver carp, like Asian carp, is an invasive fish threatening the Great Lakes. Greg Sass, INHS Illinois River Biological Station Director, said that silver carp 'accounted for more than 50% of the catch' during 18 weeks of sampling last summer. The full-text of the article can be found on the NewsBank website: Fish fence may get turned on this month But Asian carp barrier for Great Lakes would be at just 25% power