very different baiting for the two types of hook. Consider a compass with the bottom of a hook bend at 180 degrees and the hook point at 270
generally the J hook requires you to leave the hook point, barb and about 90 degrees from 270 - 180 clear of the bait
generally a circle requires the whole of the gap from 270 round to the shank to be completely clear. It folllows that you basically hang your bait from the bend of a circle, hooking it near the edge. Good baits for this are cuttle strips, mackerel strips and, to a lesser degree, squid strips - all because they are tough and the fish will take them into their mouth before pulling them off the hook. Also excellent is a mackerel tail section, tail removed and hooked through the stump - really tough and great hooking potential. Can also hook frozen sandeels this way. Whole Calamari squid hooked through the top of the mantle hang well, especially in a current, but can be pulled of the hook quite easily.