An improved self-engaging bait fish rig and assembly device which does not require the use of any sort of tool or device to engage the fish is disclosed. The rig is made of pliable metal prongs which have sufficient strength to hold a bait fish once engaged. The prongs are formed in a bent fashion with acute angles turned inward and upward towards the center of the rig. The rig attaches to the hook by way of rubber o-ring, which allows for movement of the rig along the hook. The prongs of the rig are spring-biased, thereby resetting the spring action to the closed position while in use. Such spring closure is reinforced by a rubber o-ring that encircles both prongs allowing for flexibility in stretching the prongs apart for insertion into the body or eyes of the fish.