There are numerous ways of rigging ballyhoo as well. Using a circle hook has proved to be incredibly effective for billfish and other species, thanks to the design’s propensity to hook the fish in the corner of the mouth. Fewer billfish are gut-hooked with circle hooks, which reduces post-release mortality. This rig uses a small rubber o-ring, often called a biscuit or donut, attached to a short length of copper rigging wire. With this rig, the circle hook is free to rotate in any direction, and baits can be replaced quickly and easily, even with a novice crew.