Hardheads are fun to catch (isn't everything?) but no good to eat unless you're a shark. They do make pretty good shark bait. Gafftopsail cats aren't nearly as common as hardheads, but are pretty good to eat. Also, if you'll set the filleted carcass on an anthill and let them clean off all the meat, right behind the head, you'll find a bone that looks like a crucifix; remove it and shake it, and it rattles like dice in a cup.