I've caught quite a few of these over the years, mostly by accident but they are an overlooked species when nothing else is going on. The large ones have quite a bit of fight even for heavy equipment. My dad, my uncle, and I tried cleaning one once because we heard they were good to eat. However, the attempt quickly turned into one of our favorite fishing stories of all time. We tried knives which were useless, my dad pulled out a pair of tin snips, and we tried a few other sordid instruments. By the time we gave up, we had one mangled filet that we used for catfish bait. How do you skin off that armor?
..BillH