HAWAIIAN A'U MARLIN BONE FISH HOOK FISHERMAN NECKLACE PENDANT The anglers of Sportfish Hawaii are always in pursuit of Hawaii's ultimate sporting prize: The Pacific Blue Marlin or "A'u"; one of the largest, most beautiful, and most powerful fish in the sea. Carved from ox bone with incredible detail , the pendant is approx. 1" long x 1 1/2" wide, skillfully wrapped, on a 28" natural braided cotton cord necklace with bone bead adjustable sliding knot to any length you need.