When the fish are not at the surface, drop a jig down! Blue Flame is a heavy saltwater jig, built for fishing below the surface. They have been popular with Japanese jig fishermen for some time, now worldwide.The weight and unique body shape allows it to fall faster through the water (about 6 to 8 feet per second, depending on tackle and conditions) with an action that is just right when the lure is quickly jerked and retrieved. Deadly weapon for ambarjacks.