Fishing for catfish and other large predator fish has a loyal following in the UK. Here’s what you must know in the way of fishing tackle, should you want to pursue this wily fish.. Catfish are usually spotted in deep waters, sunken trees, and weed beds. Although they frequent these locations, catfish will range far and wide when feeding, so anglers have a wide selection of locations where they can drop their bait. Even for the veteran UK angler, catching a large catfish can pose a big challenge. The correct fishing tackle could make the difference between success and failure.