Very nice cats.
I used to catch big catfish in the Greybull River of northern Wyoming. Good eating, though the big ones can be stronger tasting, as someone noted earlier.
Later, I caught much smaller cats (bullheads) in the St. Joe River of northern Idaho.
This was fun fishing, because you never quite knew what you might pick up. Species overlapped in places, so you might get a bullhead, perch, bass, crappie or even a cutthroat trout.
Rather like fishing the ocean.
One day I pulled in my line and found a big crawfish hanging onto my bait. Crawfish let go once they break water, as did this guy. He drifted back to the bottom, out of sight. Bass LOVE crayfish; it's like candy for them. I've caught bass in areas that people swore were fished out. They weren't, but the bass were educated to all the angler tricks, but couldn't resist a live crayfish hooked through the tail and pulled herky-jerky near the surface.
Fish are designed to see UP more than they see down. Pull a crayfish along, near the surface where it contrasts against the sunlight, and fish will shoot out of the depths for dinner!

But I digest ... <burp>
All this talk of fish has got me hungry for some ...