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Rare American Eel Caught and Released in the Chicago River

Biologists call it a reminder that fish movement in Chicago’s waterways remains poorly understood.

Overview

  • Angler Ben Gorashchenko, who landed the fish on Monday, May 4 near the Riverwalk by Grand Avenue, photographed the American eel and released it.
  • Researchers say the find is exceptionally rare in the city, with only one other documented catch in recent years, reported in 2017.
  • American eels hatch in the Sargasso Sea and can travel thousands of miles into rivers, sometimes slipping past locks, dams and electric barriers built to control species movement.
  • Scientists offered possibilities for how it arrived, from a long route through the St. Lawrence River and Great Lakes to a human release such as a former pet, with no confirmed origin.
  • State biologists note routine daytime surveys often miss nocturnal, bottom-dwelling eels, and local advocates say rising species counts suggest improving river health.