From the Milwaukee-Journal Sentinel:

Thursday was a rough day to be a fish in the Little Calumet River south of downtown Chicago.

Dozens of fishery crews took to the murky waters with barrels of fish poison in the latest effort to keep Asian carp from swimming up the heavily plumbed Chicago waterway system and into Lake Michigan.

“We’re going to be able to kill damn near everything in here,” said the U.S. Fish and Wildlife Service deputy regional director Charlie Wooley at the beginning of a five-day, $1.5 million fish eradication program on a two-mile stretch of river.

Federal officials are hoping to confirm what environmental DNA testing has been telling them for the better part of a year: At least a tiny number of the voracious invasive carp have breached an electric barrier about 25 miles downstream from Lake Michigan.

“If there are Asian carp here, we should get confirmation of that this week,” said John Rogner of the Illinois Department of Natural Resources. Read more.

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Join the 2026 Great Lakes BioBlitz! 🌎🦋📸Starting Earth Day, educators, students, youth groups, and families are invited to help document biodiversity across the Great Lakes region using iNaturalist. A kick-off webinar is scheduled for April 16th at 2 pm CT.Participate anytime during the four‑week event. Snap photos, make observations, and contribute to real conservation data while getting students outside and engaged with nature. Learn more and get ready to explore: https://sites.google.com/wisc.edu/annual-great-lakes-bioblitz/2026 #TeachingTuesday#GreatLakes
Don’t miss out! Join us for a deep dive into the latest Lake Michigan fisheries science.Topics will include:-Reef restoration impacts on aquatic and fish species-Wild reproduction rates for salmon and trout species from the Great Lakes Mass Marking Program-Fisheries update from the Illinois Department of Natural ResourcesLearn more & register: https://purdue.ca1.qualtrics.com/jfe/form/SV_86eBlPnbjdm7pPg
Celebrate Earth Day with freshwater science and good conversation! Join Illinois-Indiana Sea Grant, the Northwestern Center for Water, Loyola University researcher Tim Hoellein, and IISG’s Sarah Zack for Science Sips: Trash Talk about Chicago Waterways. Learn what research reveals about litter and trash in Lake Michigan and Chicago waterways and what we can do to help.Plus, enjoy Great Lakes trivia games!📅 April 22, 2026⏰ 7–9 PM📍 Sketchbook Brewing Company, Evanston Tap RoomCome curious and ready to test your Great Lakes knowledge!