We have fried some and they were about like regular catfish. Enough ketchup and horseradish can make boot leather tolerable. I would rather keep something else to cook, but if I was hungry I would keep them.
Have chunk up several to fish with when it gets tough and bait fish don't cooperate but man they are nasty. Always take a bucket to keep water in to wash hands off and dump and refill as necessary. Far as eating not for sure. I can't get that slime out of my head enough to choke it down