剑鱼,或称剑旗鱼,是海洋中一种非常凶猛的鱼,速度极快,其坚硬的上颌骨可刺穿很厚的船底。在英国伦敦博物馆,保存着一块被剑鱼刺穿的50cm厚的船底。匕首作为一种近身格斗武器,锋利的刃加上灵活快速的攻击是其取胜的要素,取名为“剑鱼”可见制作工匠的用意。该匕首全长238mm,刃长137mm,采用全龙骨结构,刀身采用天梯 Swordfish, or Swordfish, is a very ferocious fish in the oceans that is fast and whose hard upper jaw pierces a thick bottom. At the Museum of London, England, a 50cm thick bottom pierced by a swordfish is preserved. Dagger as a melee combat weapon, sharp edge with agile and rapid attack is the key to its success, named “swordfish” visible craftsman’s intention. The dagger length 238mm, blade length 137mm, the use of full-keel structure, the blade using the ladder