In the UK, going after large fish, like catfish, is a past time pursued by many anglers. Here’s what you need to know in the aspect of fishing tackle, should you want to pursue this wily fish.. Catfish are usually spotted in deep waters, sunken trees, and weed beds. Even so, catfish have been spotted to be present in and frequent other areas in other to feed. Going after and actually catching large catfish is no mean feat, even for the experience UK angler. The right fishing tackle could make the difference between success and failure.