Decked out in waders and battery-powered backpacks, a crew from the Minnesota Department of Natural Resources cut through brush to reach a stream in Wabasha County. The State Fair was approaching, and it was time to catch some fish.
Led by fisheries specialist Eric Sanft and biologist Dan Spence, the group of four were looking for “brookies,” or brook trout, in a tributary of the Zumbro River. Spence and another member of the team wore the specialized backpacks, attached to long metal poles that ended in a loop and a trailing bundle of wires. The hardware runs an electrical circuit through the water. The idea was to stun the fish, but not kill.
Spence agreed that the equipment had a “Ghostbusters” look. “It may or may not have been borrowed from work for Halloween,” he said. But there were no specters to catch — only the fish that, caught in the current, slowly floated to the surface.

Every year for at least two weeks before the Great Minnesota Get-Together, DNR crews fan out on rivers and streams to help stock the agency’s centerpiece pond and aquariums inside its log building. As opening day approaches, they also retrieve truckloads of captive fish, some of which have attended the fair for decades, from a clandestine location that the DNR guards throughout the year.
It’s all an effort to put together one of the most popular fair attractions, and one of the few where visitors can actually see wild animals rather than domesticated livestock.
Waist-deep in the chilly trout stream, Sanft and Spence found that a job that might normally have taken an hour stretched through the morning. The stream was full of “young-of-years” — fish that emerged in the spring but were too small to bring to the fair. One of the crew found himself pulled into mud and clambering over the limbs of a fallen tree as he extended the electrical probe to coax trout out of a deepwater pocket.
Eventually, after slowly walking against the current, the team had netted enough mature fish to fill two buckets. These trout were one of the few populations in Minnesota that could not be genetically linked to any known hatchery, meaning their ancestry stretched back to when Minnesota was covered with glaciers.
They were loaded into a specialized tank on the back of a truck, where the water was cooled and continually pumped with oxygen to keep the fish breathing. Not every fish was likely to survive the trip to the fairgrounds — a stowaway white sucker was already floating belly-up by the time it was placed inside.