Nets
I've seen a couple of different kinds down on the river, most were the hoop nets which are wire mesh, they have a crane built on the boat to lift them out of the water, they have several chambers in them so the cats are sorted by size, normally they have white jugs floating above them, I have also seen them use the orange barrels on the shoreline to mark them.
I have only seen the guys harvest during the daylight hours, the nets are always against the shoreline in deep enough water so that the net is fully submerged, maybe 6 foot of water or more.
The guys that do it are nice as I have met sevral, and like the others have said, it's a job good paying at that but you have to work hard to get them.
Larry and I observed them a couple of years ago above the New Richmond ramp, at the time I was not aware that the jugs were marking there nets, I assumed it was a drop off that somebody had marked so we were fishing it. fellows came along and asked us if we had caught any which we had and then asked us if we could pull or boat so they could get to the nets, felt kind of stupid I'm parked right on top of there spot, we moved back, these guys had a flatbottom boat that was better than 30 foot in length and over 10 foot wide, they tried pulling the net and was straining to do so so they grabbed the end of it, man there were some big Flats in that net, no wonder we weren't catching any flats, they had them all.
I've been trying for better than five years to get regulations set forth on catfish, Frank VanWinkle has been doing it almost his whole life, bottom line is there is major bucks in this business, and I don't have the backing or the dollars to put the regulations in place.
Doc