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Hundreds of anglers participate in the #ChicagoFishes event Oct. 13 to celebrate decades of cleanup efforts to the Chicago River. (© Shedd Aquarium)

An American eel caught by a 5-year-old angler last week is possibly the first such eel ever recorded in the Chicago River, according to the Illinois Department of Natural Resources.

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In the depths of a Chicago winter – and especially when there's a winter heat wave – sometimes you just have to get outside. But what if you’re not one for skiing or skating? We decided to go fish.

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Scientists have found female eggs growing in the testicular tissue of some male largemouth bass taken from the Des Plaines River. (Jonathunder / Wikimedia Commons)

We speak to the co-author of a newly published study in which scientists dissected 51 male largemouth bass and found that 21 – some 41 percent – had grown female eggs in their testicular tissue.

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The Chicago River is far from America's cleanest waterway. But a few anglers are trying their luck as its ecosystem improves. Captain Tim Frey took us for a winter fishing trip on the river.